Baked Tilapia Casserole with Peppers and Carrot

Tilapia vegetable casserole is a gentle baked fish dish with sweet pepper, carrot and onion. The vegetables are softened first, so the fish can finish quickly without waiting for raw carrot to cook. This version uses a light sour cream and lemon coating instead of an egg marinade and a preliminary fry. Fillets should sit in one layer for even doneness. Keep the cover on during most of baking, then rely on a temperature check rather than the colour of the topping.

Recipe at a glance

Yield: 4 servings. Prep: 20 minutes. Cook: 30 minutes. Total: 50 minutes, including 0 minutes of additional resting, cooling, chilling or draining where stated. Times are estimates; follow the doneness checks.

Equipment

Skillet, 20 × 30 cm baking dish, foil and food thermometer

Ingredients and directions

Doneness checks

Heat oven to 190°C (375°F). In a skillet, heat oil over medium heat and cook onion, carrot and pepper 8–10 minutes until flexible. Fish should flake under light pressure and reach 63°C (145°F). Add a few minutes if needed. Finish with dill and serve hot.

Helpful tips

• Use fully thawed fish.
• Pat fillets dry.
• Soften carrot before layering.
• Check thick fillets at their centre.

Troubleshooting

• Wet fish or vegetables that were not sautéed can release excess liquid. Dry fillets and soften vegetables first.
• Pat fillets dry.

Serving ideas

• Serve over steamed rice.
• Pair with boiled potatoes.
• Add green salad.
• Offer lemon wedges separately.

Substitutions

Use cod or haddock fillets of similar thickness; cooking time may increase.

Variation

Add 1/2 tsp paprika to the sour cream mixture.

Make ahead

Cook vegetables a day ahead and refrigerate; assemble with cold fish just before baking.

Storage and reheating

Refrigerate promptly for up to 2 days for best texture. Reheat covered to 74°C (165°F). Freezing can make the dairy coating grainy.

Food safety

Use clean utensils and wash produce. Keep perishable ingredients refrigerated at 4°C (40°F) or below. Refrigerate perishable leftovers promptly, within 2 hours, or within 1 hour above 32°C (90°F).

Frequently asked questions

Why is the casserole watery?

Wet fish or vegetables that were not sautéed can release excess liquid. Dry fillets and soften vegetables first.

Can I bake frozen fillets directly?

Thaw in the refrigerator for this layered method so the vegetables and fish cook evenly.

How to tell when it is ready

Heat oven to 190°C (375°F). In a skillet, heat oil over medium heat and cook onion, carrot and pepper 8–10 minutes until flexible. Fish should flake under light pressure and reach 63°C (145°F). Add a few minutes if needed. Finish with dill and serve hot.

Tips

• Use fully thawed fish.
• Pat fillets dry.
• Soften carrot before layering.
• Check thick fillets at their centre.

Troubleshooting

• Wet fish or vegetables that were not sautéed can release excess liquid. Dry fillets and soften vegetables first.
• Pat fillets dry.

Substitutions

• Use cod or haddock fillets of similar thickness; cooking time may increase.

Variations

• Add 1/2 tsp paprika to the sour cream mixture.

Serving suggestions

• Serve over steamed rice.
• Pair with boiled potatoes.
• Add green salad.
• Offer lemon wedges separately.

Make ahead

Cook vegetables a day ahead and refrigerate; assemble with cold fish just before baking.

Storage

Refrigerate promptly for up to 2 days for best texture. Reheat covered to 74°C (165°F). Freezing can make the dairy coating grainy.

Food safety

Use clean utensils and wash produce. Keep perishable ingredients refrigerated at 4°C (40°F) or below. Refrigerate perishable leftovers promptly, within 2 hours, or within 1 hour above 32°C (90°F).