Zucchini Casserole - cooking recipe

Ingredients

3 large or 6 small zucchini, sliced
3 Tbsp. margarine
minced onion and Parmesan cheese
1 can tomato sauce
Mozzarella cheese

Preparation

Cook zucchini, onion and Parmesan in margarine until cooked down.
Add 1 can tomato sauce.
Layer Mozzarella cheese on top until it melts.