Cooking a delicious dinner for the whole family

Ingredients:
Butter - 20 gr.
Rice - 150 gr (boil).
Vegetable oil - 100 ml.
Onion - 1 pc.
Red onion - 1 pc.
Sweet pepper - 1 pc.
Salt - to taste.
Ground black pepper - to taste.
Canned peas - 4 tbsp.l.
Fillet of any fish (I have haddock) - 700 gr.
Mayonnaise - 2 tbsp.l.
In the oven - 190 degrees. 25 min.
Cheese - 100 gr.
In the oven - 190 degrees. 10 min.
Bon Appetit!