Name: Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: American
Ingredients: 2 pounds Chilean sea bass fillets (or another white fish fillet of your choice, thawed if previously frozen); Extra virgin olive oil (for drizzling and pan oiling); Kosher salt (to taste); Black pepper (to taste); 1 teaspoon red pepper flakes or 2 teaspoons Aleppo pepper; 1/4 cup basil pesto (homemade or store-bought, plus more to your liking); 1 to 2 lemons, halved; 1 cup grape tomatoes, halved (optional)

Jump to Recipe· 4.1 from 11 reviews

I am excited to share one of my absolute favorite dishes with you: Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe. This dish feels effortlessly elegant to me, combining the rich, buttery texture of the sea bass with the fresh brightness of homemade basil pesto and the smoky, tangy charm of grilled lemon. Every bite tastes like a celebration of flavors, and I love how simple it is to bring this restaurant-worthy dinner to my own kitchen.

Why You’ll Love This Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe

What first hooked me on this Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe is its amazing flavor profile. The sea bass bakes up buttery and flaky, almost melting in your mouth, while the basil pesto adds just the right herbaceous punch and earthiness. The grilled lemon? That touch of smoky acidity brings everything to life and balances those rich flavors perfectly. Cooking this feel-good dinner always brightens my day, especially when I want something that tastes fancy but feels comforting.

Another reason I adore this recipe is how wonderfully easy it is to prepare. Literally, you season, cover, and bake the fish, then grill some lemons on the side while it cooks. The whole process takes less than 30 minutes from start to finish, which feels like a win for a dish this impressive. I also think it makes a beautiful centerpiece for all kinds of occasions—whether I’m hosting friends, planning a family dinner, or just treating myself on a weeknight. It truly stands out because it looks gourmet but requires minimal fuss.

Ingredients You’ll Need

The image shows a large white fish fillet laid flat on a white tray with a shiny texture. On the top left corner of the tray, there is a clear glass bottle filled with yellow olive oil. Next to it is a small white dish divided into two sections holding brown and white spices. Below the fish fillet, a small white bowl contains a thick green sauce, and beside it is a smaller white bowl filled with red chili flakes. To the right of the tray, there are bright red cherry tomatoes inside a white bowl, and two halved bright yellow lemons placed on the white marbled surface along with a whole lemon. The setting is bright and clean, with a white marbled background. photo taken with an iphone --ar 4:5 --v 7

To create this delicious Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe, you only need a handful of simple yet essential ingredients that perfectly complement each other. Each one adds a specific touch—whether it’s richness, freshness, seasoning, or texture—to build a perfectly balanced dish.

Chilean sea bass (2 pounds): I choose this fish for its buttery texture and mild flavor, but feel free to swap with another white fish.
Extra virgin olive oil: This adds a subtle fruity richness and helps keep the fish moist while baking.
Kosher salt: Enhances all the natural flavors without overpowering the fish.
Black pepper: Adds just the right amount of mild heat and depth.
Red pepper flakes or Aleppo pepper (1 teaspoon or 2 teaspoons): These give the dish a gentle, warm kick—perfect if you like a little spice.
1-2 lemons, halved: Grilling the lemons softens their flavor while adding a delicious smoky tang.
Basil pesto (1/4 cup): Homemade is heavenly but store-bought works great too—this pesto is the herbaceous heart of the dish.
Grape tomatoes (1 cup, halved, optional): I like adding these for a juicy burst of sweetness and color contrast on the plate.

Directions

Step 1: Start by positioning a rack in the middle of your oven and preheat it to 425°F. Meanwhile, lightly oil a large baking pan to make sure your fish won’t stick and has a nice glossy finish after baking.

Step 2: Place the sea bass fillets in the prepared baking pan and drizzle generously with extra virgin olive oil. Then season the fish all over with kosher salt, freshly ground black pepper, and your choice of red pepper flakes or Aleppo pepper for that lovely spicy warmth. Cover the pan tightly with foil, tenting it so the foil doesn’t touch the fish and disrupt the delicate texture.

Step 3: Bake the fish in your preheated oven for about 12 to 15 minutes, or until the thickest part flakes easily with a fork. Keep an eye on it after 12 minutes to avoid overcooking, as this fish is best when tender and juicy.

Step 4: While the fish cooks, heat a grill pan over medium-high heat. Add your lemon halves, cut side down, and sear them for about 2 minutes until they soften and get a nice char. This grilling step brings out a smoky depth in the lemon that’s absolutely divine with the sea bass.

Step 5: Once the fish is done baking, remove it from the oven and carefully uncover the foil. Immediately squeeze one of the grilled lemon halves all over the fish for a burst of fresh acidity. Then spread the basil pesto generously on top for that beautiful green vibrancy and herbal flavor. If you’re using grape tomatoes, toss them with a pinch of salt and a drizzle of olive oil, arrange them over the fish, and serve right away with the remaining grilled lemon halves on the side.

Servings and Timing

This recipe makes approximately 6 servings, perfect for a family dinner or a small gathering with friends. The prep time is around 5 minutes since the ingredients and steps are straightforward, with the total cook time about 15 minutes. Altogether, you’re looking at roughly 20 minutes from start to finish. There’s no resting time needed as the fish is best enjoyed right out of the oven while it’s still warm and succulent.

How to Serve This Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe

A white oval plate holds a piece of cooked white fish with a slightly browned surface, topped with a thick green sauce spread unevenly across the fish. Bright red cherry tomatoes, some whole and some cut in half, are placed on top and to one side of the fish. A silver fork is digging into the fish on the right side. The plate is set on a white marbled surface. To the left of the plate are two round lemon halves with visible grill marks, showing a charred and textured look on their surface. photo taken with an iphone --ar 4:5 --v 7

I love pairing this Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe with vibrant, fresh sides that complement its rich and zesty flavors. A light salad with arugula, fennel, and shaved Parmesan makes a perfect companion. Roasted or steamed asparagus, or even a handful of buttery new potatoes tossed in herbs, balance the meal well without overpowering the gentle flavors of the fish.

For an eye-catching presentation, I spread the pesto beautifully across the sea bass and nestle a handful of juicy grape tomatoes on top to add pops of color. I always serve the remaining grilled lemon halves on the side, inviting everyone to squeeze more smoky citrus juice over their plates. The warmth of the fish straight from the oven is just right—neither too hot nor cold—and the fresh pesto keeps that bright, summery vibe. Portion-wise, one generous fillet per person feels satisfying but leaves room for sides.

When it comes to drinks, I am a big fan of a crisp, chilled Sauvignon Blanc or a dry Rosé to pair alongside. If you prefer non-alcoholic options, a sparkling water infused with cucumber and mint complements the dish beautifully, enhancing the fresh herbal notes. I’ve served this meal for casual weeknight dinners and also for special occasions like holiday feasts or dinner parties where it always impresses without causing stress in the kitchen.

Variations

If you want to customize this Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe, I have a few tips from my own kitchen experiments. You can substitute the Chilean sea bass with other firm white fish like halibut, cod, or grouper, which bake well and soak up flavors beautifully. For a lighter pesto option, try making it with spinach or kale in place of basil to change up the flavor profile.

Dietary modifications are easy with this recipe too. To make it gluten-free, just double-check your store-bought pesto ingredients or opt for homemade versions since some bottled ones might have additives. For a vegan twist, swap the fish entirely for thick slices of grilled eggplant or portobello mushrooms, followed by the same baking and pesto topping method for a satisfying plant-based meal.

When I want to vary the flavors further, I sometimes add a sprinkle of toasted pine nuts or chopped pistachios over the pesto topping for a bit of crunch. Another fun method is to finish the fish with a quick broil for 1-2 minutes at the end if you want a lightly caramelized crust. No matter how you try it, you’ll find this dish so versatile and welcoming to your personal tweaks.

Storage and Reheating

Storing Leftovers

If you have leftovers from this Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe, I recommend transferring the fish to an airtight container and storing it in the refrigerator. It stays fresh for up to 2 days. Keeping the pesto separate or adding a fresh dollop when reheating helps maintain its vibrancy and texture.

Freezing

I generally don’t freeze cooked sea bass with pesto because the texture can suffer upon thawing, and the pesto herbs lose some of their brightness. However, if you want to freeze it, wrap the cooked fish and pesto tightly in plastic wrap, then place it in a freezer-safe container or bag. Use within 1 month and thaw gently in the refrigerator overnight before reheating.

Reheating

To reheat leftovers, I find the best method is to warm the fish gently in a low oven (about 275°F) for 10-12 minutes to prevent drying out. Avoid microwaving if possible, as it can make the fish tough or rubbery. Adding a fresh squeeze of grilled lemon and a spoonful of pesto after reheating helps restore the freshly made flavors and moisture.

FAQs

Can I use frozen Chilean sea bass for this recipe?

Absolutely! Just make sure it’s fully thawed and patted dry before baking. This helps the fish cook evenly and prevents excess moisture from diluting the flavors.

Is basil pesto necessary, or can I use another sauce?

Basil pesto really shines here with its bright, herbal notes, but you can experiment with other herb-based sauces like chimichurri or a simple lemon-garlic butter if you prefer. Each will bring a unique twist.

How do I know when the sea bass is perfectly cooked?

The fish is done when it flakes easily with a fork and feels just opaque in the thickest part. Overcooking will make it dry, so check at 12 minutes and adjust accordingly.

Can I grill the fish instead of baking it?

You can! Just brush the fish well with olive oil to prevent sticking, grill over medium-high heat for about 4-5 minutes per side, and then top with grilled lemon and pesto. I love the smoky flavor that grilling imparts.

What sides pair best with this dish?

I recommend fresh, light sides like a crisp green salad, roasted asparagus, or herbed new potatoes. These complement the richness of the sea bass and keep the meal balanced and satisfying.

Conclusion

I truly hope you give this Baked Chilean Sea Bass with Basil Pesto and Grilled Lemon Recipe a try because it’s one of those dishes that never fails to impress and delight me. It’s simple enough for a weeknight yet elegant enough for special gatherings, and the combination of flavors is just irresistible. Cooking and sharing it always feels like a celebration, and I know it will quickly become one of your favorites too!