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Fish Casserole "Royally"

by Editorial Staff

Fish casserole according to this recipe is cooked in an oven. Fish casserole contains not only a lot of protein and carbohydrates but also vitamins, which are rich in bell peppers, onions, and garlic. The fish is very tasty, with a bright garlic aroma. Enjoy your cooking!

Summary

Cook Time1 hour 5 minutes
Total Time1 hour 5 minutes
CourseMain Dish
Servings (Default: 6)

Fish Casserole “Royally” Ingredients

  • Fillet of white fish – 1 kg
  • Potatoes – 500 g
  • Champignons – 300 g
  • Onions (medium size) – 1 pc.
  • Bulgarian pepper – 1 pc.
  • Vegetable oil – 3 tbsp
  • Salt to taste

Fish Casserole “Royally”

For the sauce:

  • Butter – 80 g
  • Garlic – 2 cloves
  • Wheat flour – 30 g
  • Cream 10% – 200 ml
  • Sour cream 15% – 100 ml
  • Salt – 1 teaspoon
  • Turmeric – ½ teaspoon
  • Sugar – ½ teaspoon.

For filing:

  • Fresh dill

Fish Casserole “Royally” Instructions

  1. For cooking, you can take any white fish fillet, I have 650 g of the cod fillet and 350 g of the sole fillet. Boil potatoes in their skins in salted water until tender. Preheat the oven to 180 degrees.
  2. Pre-thaw the fish, drain the excess liquid. Blot the fish with a paper towel and cut into large cubes about 4-5 cm. Remove bones from the fillet, if any.
  3. Peel the boiled potatoes and cut them into slices.
  4. Cut the mushrooms into slices.
  5. Cut the bell pepper into squares of about 1.5 cm.
  6. Cut the onion into half rings.
  7. Pass the garlic through a press.
  8. Add vegetable oil to a preheated skillet. Fry the onion until light golden brown.
  9. Add mushrooms and fry for another 5 minutes. In the end, add salt and stir.
  10. Melt the butter in another skillet. Gradually add flour with constant stirring.
  11. Stir constantly, pour in the cream and sour cream. Continue stirring.
  12. Salt the sauce, add sugar, garlic, and turmeric. Cook the cream sauce for another 5 minutes.
  13. Place the potatoes in an ovenproof dish. Distribute fish, mushrooms with onions, and bell pepper on top.
    Fish Casserole “Royally” step 13
  14. Pour over the sauce generously. Put fish and potatoes in an oven preheated to 180 degrees for 30 minutes.
  15. Sprinkle the fish casserole with chopped dill before serving.
    Fish Casserole “Royally” step 15

Enjoy your meal!

Editorial Staff

About Editorial Staff

The Boss Kitchen editorial staff oversees content review, fact-checking, and recipe verification across the site. Published articles pass through the editorial team before going live, ensuring ingredient lists, techniques, cooking times, and nutritional claims hold up in a home kitchen. The team coordinates contributions across the site writers, handles reader corrections, and maintains consistency in measurement conventions, safety guidance, and dietary labeling. Posts under this byline typically represent team-reviewed reference material, site announcements, or editorial roundups rather than individual-author features, and they are held to the same sourcing standards as bylined recipe and product coverage.

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