If you’re looking to make a splash at your next dinner (and treat yourself to something truly special), this Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe will leave you dazzled. Imagine thick, buttery seabass fillets seared to golden perfection and then blanketed in an aromatic, nutty walnut pesto that’s kissed with fresh basil, lemon, and Parmesan. This showstopper dish is keto-friendly, fast enough for a weeknight, yet elegant enough for guests. It’s one of those recipes I keep coming back to because every bite is pure joy!

Ingredients You’ll Need
It’s truly remarkable how a handful of well-chosen ingredients can create something so memorable! Each element in this Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe plays an important role—whether it’s lending creaminess, big flavor, or a vibrant pop of color to the finished plate.
- Chilean seabass fillets: These are wonderfully rich and flaky, the perfect base for our punchy pesto crust.
- Salt and pepper: Essential for seasoning and letting all those fresh flavors shine.
- Olive oil: Used twice, both for searing the fish and blending the pesto, offering a fruity backdrop and crisp finish.
- Walnuts: They bring a buttery crunch and subtle earthiness to the pesto, setting it apart from the usual pine nut version.
- Fresh basil leaves: Bright, herbal, and just the thing to freshen up the whole dish.
- Parmesan cheese: Adds irresistible savory depth to the pesto—never skip the cheese!
- Garlic: One clove is all you need for punchy, aromatic flavor.
- Lemon zest and lemon juice: Zesty, tangy citrus wakes up the pesto and the fish, tying everything together.
How to Make Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe
Step 1: Prepare for Success
Start by preheating your oven to 400°F. This ensures a gentle but effective finish in the oven after you’ve created that irresistible golden crust from searing. Gather all your ingredients and set out your food processor—things move fast here!
Step 2: Pat and Season
Use paper towels to gently pat each Chilean seabass fillet dry. This step makes a world of difference, helping to achieve that beautiful, golden sear. Season both sides with salt and pepper, making sure every bite will be full of flavor.
Step 3: Whirl Together the Walnut Pesto
In your trusty food processor, combine the walnuts, freshly picked basil leaves, Parmesan, garlic, lemon zest, and lemon juice. Pulse until everything’s finely chopped and beautifully fragrant. Then, while blending, slowly pour in the ¼ cup of olive oil—it should come together in a thick, vibrant pesto paste. Taste and adjust for lemon or salt as needed.
Step 4: Sear the Seabass
Heat the remaining 2 tablespoons olive oil in an oven-safe skillet over medium-high heat. Once shimmering, add the seasoned seabass fillets. Sear for about 2 minutes on each side, until you see a pretty golden crust. This creates a savory foundation and locks in moisture before the oven finish.
Step 5: Add the Walnut Pesto Crust
Turn off the heat, and generously spoon the walnut pesto mixture right on top of each fillet, gently spreading it to cover the fish evenly. Get ready for magic—the oven will meld these flavors together!
Step 6: Finish in the Oven
Transfer the skillet to your preheated oven. Bake for 8 to 10 minutes, until the fillets are opaque and flake easily with a fork. The pesto will look toasty and aromatic—I promise, your kitchen will smell positively divine.
How to Serve Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe

Garnishes
I love to finish these flavorful fillets with a handful of fresh basil leaves, a sprinkle of extra lemon zest, and a drizzle of good olive oil. The added greenery and citrus send the flavors soaring while making the whole dish pop visually on the plate.
Side Dishes
Steamed vegetables like tender asparagus or crisp-tender broccolini make ideal partners for this rich, buttery fish. For a classically keto twist, cauliflower mash is all you need for a hearty, comforting plateful that catches all that luscious sauce.
Creative Ways to Present
If you’re in the mood to impress, cut the fillets into nuggets and serve “family style” over a platter of wilted greens, or turn the fish and pesto mixture into sophisticated lettuce wraps. This Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe is as versatile as your creativity allows!
Make Ahead and Storage
Storing Leftovers
Cool any extra seabass fillets to room temperature, then cover them tightly or slide into a sealed container before refrigerating. They’ll stay fresh for up to two days—just be sure you keep those flavors locked in!
Freezing
For best results, freeze the fillets and pesto separately. The cooked seabass will hold its texture well for up to a month when wrapped tightly. Defrost both components in the fridge overnight when you’re ready to enjoy your leftovers again.
Reheating
To reheat, place the fish in a baking dish, cover with foil, and warm gently in a 300°F oven until just heated through. Add any extra pesto at the end to preserve its fresh taste and color. This helps the dish taste nearly as wonderful as when you first made it.
FAQs
Can I use another type Main Course
Absolutely! While Chilean seabass is melt-in-your-mouth divine, similar thick, flaky white fish like cod, halibut, or grouper work beautifully with this Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe.
Is the walnut pesto good for other dishes?
Yes! The pesto from this Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe is heavenly on zucchini noodles, grilled chicken, or even tossed with roasted veggies for a quick side.
Can I make the walnut pesto ahead of time?
Certainly—prepping the pesto in advance makes dinner even easier. It keeps well for up to three days in the fridge in a tightly sealed container, so the flavors stay punchy.
What’s the best way to get a perfect sear on the seabass?
Make sure the fillets are patted dry, your skillet is hot, and don’t move the fish around too much as it cooks—this is the secret to achieving that golden, restaurant-style crust!
Is this Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe kid-friendly?
Definitely! The flavors are mild and approachable for most palates, though feel free to adjust the garlic or use less lemon if your little ones prefer things on the plainer side.
Final Thoughts
If you’ve never tried a dish like Keto Chilean Seabass with Walnut Pesto Crustacés: An Amazing Ultimate Recipe, now is absolutely the time. Whether you’re celebrating something special or just want to treat yourself to a restaurant-quality meal at home, I hope this becomes a favorite at your table, too. Happy cooking!
