Fish gratin, quick and simple

Ingredients

• 1.3 lbs white fish
• 1 lb potatoes
• 7 oz mushrooms
• 1 oz flour
• 1 oz butter
• 2 cups milk
• 3 oz grated cheese
• salt
• pepper
• nutmeg

Materials

• Gratin dish

Preparation

• Peel and cut the potatoes into dice. Cook them 10 minutes in boiling water.
• Grease the dish with butter, and arrange the potatoes in the bottom. Cut the fish into big pieces, and place them on the potatoes. Finally, add the minced and cleaned mushrooms.
  
• The white sauce : melt the butter in a pot, and add the flour at once. Stir with a whisk.
• Gradually add the milk, while stiring with the whisk. The mix should get thicker. Add salt, pepper and nutmeg.
  
• Pour this sauce in the gratin dish on the ingredients. Sprinkle with grated cheese.
• Bake 40 minutes at 350°F (180°C).
  
• There you are, your fish gratin is ready!