Broccoli Casserole - cooking recipe

Ingredients

1 (32 oz.) frozen broccoli cuts
1 onion
1 c. water
salt
1 c. Cheddar cheese
1 c. Mozzarella cheese
1 can cream of mushroom soup
2 eggs
2 cans water chestnuts, chopped
1/2 c. mayonnaise

Preparation

Add remaining 6 ingredients to cooked broccoli and onion. Bake at 275\u00b0 to 300\u00b0 for 1 hour.
Bake slow, so it's not watery. Crumble one tube Ritz/Town House with 1/2 stick margarine.
Top casserole with topping with 10 minutes to go in cooking time.