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–+ servings
Fish Casserole in baking dish with wooden serving spoon.
Kaeleigh Pugliese

Fish Casserole

5 from 4 votes
This Fish Casserole is a simple baked dinner made with tender haddock, a creamy sour cream sauce, vegetables, and melted Gouda cheese.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 4 servings
Course: Dinner
Cuisine: American
Calories: 447
Ingredients Equipment Method Nutrition Notes

Equipment

Ingredients  

  • 1 pound frozen haddock, thawed
  • 1 cup sour cream
  • 1 onion, diced
  • 2 tomatoes, diced
  • 1 red bell pepper, diced
  • 1 green bell pepper, diced
  • 1 teaspoon ground coriander
  • ½ teaspoon dried thyme
  • ½ teaspoon paprika
  • 1 cup gouda cheese, shredded

Instructions
 

  1. Preheat the oven to 350 degrees. Grease a 9x13 baking dish and set aside.
  2. In a large skillet, heat a tablespoon of olive oil on medium heat and cook onion, tomatoes, bell peppers, coriander, thyme, and paprika for 5-10 minutes.
  3. Add the sour cream and cook until heated through. Season with salt and pepper to taste.
  4. Arrange the haddock pieces in a casserole dish, then pour the sauce over the haddock.
  5. Top with the grated cheese and bake for 25 minutes. Garnish with fresh parsley and serve.

Nutrition

Calories: 447kcalCarbohydrates: 13gProtein: 36gFat: 28gSaturated Fat: 16gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 0.01gCholesterol: 163mgSodium: 750mgPotassium: 782mgFiber: 3gSugar: 8gVitamin A: 2438IUVitamin C: 73mgCalcium: 509mgIron: 1mg

Notes

  • Prep the Fish: If using frozen haddock, make sure to thaw it completely and pat it dry with paper towels to remove excess moisture before baking. This helps prevent a watery casserole.
  • Sauté for Maximum Flavor: Cooking the onions, tomatoes, and bell peppers first allows their flavors to develop and blend before adding them to the casserole.
  • Add the Sour Cream Off Heat: To prevent curdling, stir in the sour cream after removing the skillet from heat rather than cooking it for too long.
  • Even Cooking: Arrange the fish in a single layer in the baking dish to ensure even cooking and allow the sauce to coat each piece evenly.
  • Golden Brown Topping – For a crispier, more golden top, broil the casserole for the last 2-3 minutes of baking.

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