Baked Halibut on Slow-Cooked Spiced Peppers

Baked Halibut on Slow-Cooked Spiced Peppers

Meaty fish fillets rest delicately on a vibrant, sweet bed of slowly melted bell peppers and onions, infused with aromatic toasted fennel and coriander seeds, finished with bright lemon zest.

1h 15mIntermediate4 servings
Remix

Equipment

Large saute pan with lid
Baking dish
Mortar and pestle
Microplane

Ingredients

4 servings

Spiced Pepper Bed

  • 3 g fennel seeds, whole
  • 3 g coriander seeds, whole
  • 45 ml extra virgin olive oil
  • 300 g yellow onions, thinly sliced
  • 15 g garlic, thinly sliced
  • 600 g bell peppers, thinly sliced, seeds and stems removed
  • 5 g kosher salt
  • 2 g black pepper, freshly cracked

Fish and Finish

  • 600 g halibut fillets, skinless, divided into 4 portions
  • 15 ml extra virgin olive oil
  • 4 g kosher salt, for seasoning fish
  • 2 g lemon zest, freshly grated
  • 10 g fresh parsley, finely chopped

Nutrition (per serving)

Nutrition is estimated per serving. Nutrients without complete source data are omitted.

388
Calories
34g
Protein
21g
Carbohydrates
20g
Fat
5g
Fiber
10g
Sugar
1004mg
Sodium
Full nutrition
Calories
388 kcal
Protein
34 g
Carbohydrates
21 g
Fat
20 g
Fiber
5 g
Sugar
10 g
Sodium
1004 mg
Saturated Fat
3 g
Monounsaturated Fat
13 g
Polyunsaturated Fat
3 g
Cholesterol
108 mg
Potassium
1158 mg
Calcium
86 mg
Iron
1.8 mg
Magnesium
73 mg
Phosphorus
442 mg
Zinc
1.6 mg
Vitamin A
317 mcg
Vitamin C
203 mg
Vitamin E
7.4 mg
Vitamin K
59 mcg
Vitamin B6
1.2 mg
Vitamin B12
2.7 mcg
Thiamin
0.23 mg
Riboflavin
0.28 mg
Niacin
10.3 mg
Folate
110 mcg
Water
320 g

Sources: USDA FoodData Central

Method

01

Place the fennel and coriander seeds in a dry saute pan over medium heat. Toast for 2 minutes until deeply fragrant. Transfer to a mortar and pestle or spice grinder and crush coarsely.

2mLook for: Seeds become slightly darkerFeel: Aromatic oils are released and fragrant
02

Return the saute pan to medium heat and add 45ml of olive oil. Add the sliced onions and cook, stirring occasionally, until softened and translucent.

8mLook for: Onions are translucent but not heavily browned
03

Add the garlic, sliced bell peppers, crushed spices, 5g of salt, and black pepper. Stir well to combine, reduce the heat to low, cover, and cook gently. Stir occasionally until the peppers are meltingly tender.

35mLook for: Peppers are collapsed, soft, and have released their sweet juicesFeel: Little to no resistance when pierced with a wooden spoon
04

Preheat the oven to 200 C / 400 F.

05

Transfer the slow-cooked pepper and onion mixture along with all its juices into a baking dish, spreading it into an even layer. Season the halibut fillets on all sides with salt and rub lightly with 15ml of olive oil. Nest the fillets gently on top of the pepper bed.

06

Bake uncovered in the preheated oven until the fish is opaque, flakes easily with a fork, and reaches an internal temperature of 63 C / 145 F.

15mLook for: Fish turns opaque white and juices run clearFeel: Flesh separates readily into flakes when pressed
07

Remove the dish from the oven. Immediately scatter the fresh lemon zest and chopped parsley evenly over the fish and peppers. Serve directly from the baking dish.

Chef's Notes

  • The slow-cooked pepper and onion base is highly adaptable and tastes even better the next day. You can prepare it up to 48 hours in advance, keeping it refrigerated until you are ready to assemble and bake the fish, making this an ideal dish for parties.
  • Pay close attention when toasting your whole spices. You only want them to become fragrant; over-toasting coriander seed can impart a harsh, bitter flavor to the delicate fish.
  • A thicker cut of fish will require a longer baking time. If your halibut fillets are thicker than 1.5 inches, you may need to add 3 to 5 extra minutes in the oven.

Storage

Refrigerator: 3 daysThe pepper base keeps exceptionally well and improves in flavor over 3 days. The cooked fish should be consumed within 2 days.

Freezer: 1 monthFreeze the pepper mixture only. The cooked fish will degrade in texture.

Reheating: Reheat gently in a 150 C / 300 F oven until the fish is just warmed through to avoid overcooking.

Troubleshooting

Fish is dry and rubbery

Cause: The fillets were overbaked or carried over cooking for too long in the hot dish

Fix: Flake the dry fish and fold it deeply into the moist pepper mixture, allowing the vegetable juices to rehydrate the protein slightly.

Prevention: Begin checking the internal temperature of the fish 3 to 4 minutes before the estimated time. Remove from the oven slightly before the target temp, as it will continue cooking.

Peppers are watery and have pooled liquid in the pan

Cause: The bell peppers had high water content and were not cooked down enough

Fix: Carefully pour off or spoon out the excess liquid from the baking dish before placing the fish on top.

Prevention: Cook the peppers uncovered for the final 10 minutes of their stove-top cooking phase to evaporate excess moisture.

Cultural Context

This recipe draws heavy inspiration from Mediterranean coastal cooking, bearing close resemblance to the Basque piparade and the Italian peperonata. By pairing slow-cooked, naturally sweet nightshades with a robust, meaty maritime protein, the dish achieves a perfect balance between earthy depth and oceanic lightness, a hallmark of Mediterranean culinary philosophy.

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