Broccoli Casserole

Ingredients:
1/4 C chopped onion
6 T margarine
2 T flour
1/2 C water
2 boxes frozen broccoli
1 6 oz. whipped cheese spread
1/2 C grated cheddar
3 eggs, beaten
1/2 C cracker crumbs (I like Cheez-Itz)

Directions:
Preheat oven to 350. Saute onion in 4 T margarine. Stir in flour and add water. Cook until thickened, stirring constantly. Cook broccoli according to pkg. and drain. Add broccoli and both cheeses to sauce. Add eggs. Pour into oblong buttered baking dish. Use remaining butter, melted, on crushed cracker crumbs for topping. Bake in oven for 35-40 minutes.