Baked Halibut Fennel Lemon Walnut

Featured in: Oven & Pan Techniques

This elegant fish main features flaky halibut baked with tender fennel. It's crowned with a vibrant pangrattato—a crunchy topping made from breadcrumbs, toasted walnuts, garlic, and fresh lemon zest.

Prep involves slicing fennel and zesting lemon, followed by baking the fish. The pangrattato is quickly made in a skillet, then sprinkled over the halibut before a final bake. A quick and impressive meal ready in about 30 minutes, perfect for weeknights or special occasions.

Updated on Sat, 31 Jan 2026 11:40:00 GMT
Golden-baked halibut fillets topped with a crunchy lemon-walnut pangrattato, served alongside aromatic, tender fennel slices. Save
Golden-baked halibut fillets topped with a crunchy lemon-walnut pangrattato, served alongside aromatic, tender fennel slices. | saborabridan.com

The first time I made pangrattato, my kitchen filled with this incredible toasty aroma that made me wonder why breadcrumbs ever had to be boring. I'd eaten something similar at a tiny wine bar in Barcelona, where the waiter explained it was the secret that made simple fish feel extraordinary. Now it's my go-to trick when I want dinner to look like I tried much harder than I actually did.

Last Tuesday I'd forgotten to defrost anything for dinner and this recipe saved the evening entirely. My partner walked in just as I was pulling the dish from the oven and actually stopped mid sentence to ask what smelled so incredible. We ended up eating standing up at the counter because neither of us wanted to wait another second to dig in.

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Ingredients

  • Halibut fillets: Choose pieces that look opaque and firm with no browning around the edges
  • Fennel bulb: The fronds make a beautiful garnish so dont toss them in the compost
  • Fresh breadcrumbs: Stale rustic bread works even better than fresh so this is perfect for using up that end piece
  • Walnuts: Toast them in a dry pan first if you want an even deeper nutty flavor
  • Lemon: Room temperature lemons yield more juice and zest more easily
  • Garlic: Keep the pieces small so they dont burn while the breadcrumbs toast
  • Fresh parsley: Flat leaf has more flavor than curly and looks more elegant
  • Olive oil: Use something decent since you'll really taste it here

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Instructions

Get your oven ready:
Crank the heat to 200°C and grab a baking dish that fits everything comfortably in one layer
Build the fennel bed:
Scatter your sliced fennel across the dish and drizzle with half the olive oil and lemon juice then season gently
Nestle in the fish:
Lay the halibut on top of the fennel and drizzle with the remaining oil and lemon juice then add half the zest
Make the magic topping:
Warm olive oil in a skillet and add garlic and breadcrumbs stirring constantly until they turn golden brown
Add the walnuts:
Toss in the chopped walnuts for just one minute then remove from heat and stir in parsley and remaining zest
Top and bake:
Press the breadcrumb mixture onto each fillet and bake for 12 to 15 minutes until the fish flakes easily
Serve immediately:
The topping stays crispest right out of the oven so bring it straight to the table
Tender halibut baked with fennel and finished with crispy walnut and lemon pangrattato for a savory crunch. Save
Tender halibut baked with fennel and finished with crispy walnut and lemon pangrattato for a savory crunch. | saborabridan.com

This became my anniversary dinner tradition after the first year because it felt fancy enough for celebration but didnt keep me in the kitchen all evening. Theres something about the way the fennel softens and sweetens that makes the whole house feel warm and welcoming.

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Choosing The Right Fish

Halibut is fantastic here because its firm flesh holds up beautifully to baking but Ive made this with cod sea bass and even thick flounder fillets when halibut wasnt available. The key is choosing something sustainable and checking that the fillets are even thickness so they cook at the same rate. Ask your fishmonger for the freshest catch that day and trust your nose it should smell like the ocean not fishy at all.

Making Pangrattato Your Way

Once you master the basic technique youll start adding pangrattato to everything from roasted vegetables to pasta dishes. Try stirring in some grated Parmesan or using pecans instead of walnuts for a different twist. The trick is keeping the heat medium and stirring constantly so nothing burns and you get that perfect golden crunch that makes people ask whats your secret.

Side Dish Magic

A crisp green salad with an acidic vinaigrette cuts through the richness of the fish and walnuts beautifully. Steamed baby potatoes with butter and dill work wonderfully too or you can keep it light with just some roasted asparagus spears. The fennel bed underneath almost becomes a vegetable side on its own so you dont need much else to make this a complete meal.

  • Slice any leftover pangrattato and store separately for topping pasta tomorrow
  • The fish rewaves surprisingly well wrapped in foil at 300°F for 10 minutes
  • Extra lemon wedges on the table let everyone adjust brightness to taste
A close-up of baked halibut with fennel, garnished with fresh parsley and a bright lemon-walnut pangrattato. Save
A close-up of baked halibut with fennel, garnished with fresh parsley and a bright lemon-walnut pangrattato. | saborabridan.com

Somehow this simple combination always feels like a little celebration even on a random Tuesday. Thats the kind of recipe worth keeping close.

Recipe FAQs

Can I use a different fish for this dish?

Yes, cod, haddock, or sea bass are excellent substitutes for halibut. Ensure cooking time is adjusted slightly based on the thickness of your chosen fillet.

What are good accompaniments to serve with this?

A crisp green salad or steamed baby potatoes would complement this dish beautifully. The fresh flavors pair well with simple sides.

How do I store and reheat leftovers?

Leftovers can be stored in an airtight container in the refrigerator for up to 2 days. Reheat gently in the oven or a skillet to avoid drying out the fish.

Can I prepare the pangrattato ahead of time?

You can prepare the pangrattato mixture ahead and store it in an airtight container at room temperature. Add it to the fish just before baking for maximum crispness.

What type of wine pairs well with baked halibut?

A chilled Sauvignon Blanc or Vermentino would wonderfully enhance the delicate flavors of this fish with its bright acidity and aromatic notes.

Is this dish suitable for those avoiding gluten?

As written, this dish contains gluten from the breadcrumbs in the pangrattato. For a gluten-free version, use gluten-free breadcrumbs or replace the pangrattato with a crust of toasted nuts and seeds.

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Baked Halibut Fennel Lemon Walnut

Succulent halibut fillets paired with fragrant fennel and a bright, crunchy lemon-walnut topping. An easy, sophisticated meal.

Prep Time
15 min
Cook Time
15 min
Total Duration
30 min
Recipe by Nadia Hussein


Skill Level Easy

Cuisine Modern European

Amount 4 Portions

Diet Preferences No Dairy

What You'll Need

Fish & Vegetables

01 4 halibut fillets (about 6 oz each), skinless
02 1 large fennel bulb, thinly sliced
03 1 lemon, zested and juiced
04 2 tbsp olive oil
05 Salt and freshly ground black pepper, to taste

Pangrattato (Crunchy Topping)

01 2 oz fresh breadcrumbs (from rustic bread)
02 1.5 oz walnuts, finely chopped
03 1 garlic clove, finely minced
04 2 tbsp fresh parsley, chopped
05 2 tbsp olive oil

How to Make It

Step 01

Prepare the Oven and Baking Dish: Preheat the oven to 400°F. Lightly oil a baking dish large enough to hold the fish fillets in a single layer.

Step 02

Arrange the Fennel Base: Scatter the sliced fennel evenly across the base of the baking dish. Drizzle with 1 tablespoon olive oil, half the lemon juice, and season lightly with salt and pepper.

Step 03

Position the Halibut Fillets: Place the halibut fillets on top of the fennel. Drizzle with the remaining olive oil, the rest of the lemon juice, and season again. Sprinkle with half the lemon zest.

Step 04

Prepare the Walnut Pangrattato: In a skillet over medium heat, warm 2 tablespoons olive oil. Add the garlic and breadcrumbs, stirring until golden and crisp (about 3 minutes). Stir in the walnuts and toast for 1 minute more. Remove from heat and mix in the parsley and remaining lemon zest.

Step 05

Top the Fish with Pangrattato: Top the halibut fillets with the walnut pangrattato mixture, pressing lightly so it adheres.

Step 06

Bake to Perfection: Bake for 12–15 minutes, until the fish is opaque and flakes easily with a fork, and the topping is golden.

Step 07

Serve and Garnish: Serve immediately, garnished with additional parsley or fennel fronds if desired.

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Tools Needed

  • Sharp knife
  • Cutting board
  • Baking dish
  • Skillet
  • Zester or microplane
  • Spatula

Allergens

Review ingredient details for allergens. If you aren’t sure, speak to a medical provider.
  • Contains fish (halibut), nuts (walnuts), gluten (breadcrumbs), and may contain traces of wheat if using rustic bread. Double-check bread and nut packaging for possible cross-contamination.

Nutrition per serving

Use this nutrition info for general guidance only and always discuss with a professional for specifics.
  • Calorie count: 385
  • Fat content: 20 g
  • Carbohydrates: 12 g
  • Protein content: 39 g

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