1. Sauté onion in margarine.
2. Add flour, then water and cook until it thickens and boils.
3. Blend in cheese spread and stir off heat.
4. Mix cooked broccoli, sauce and eggs and pour into greased casserole dish.
5. Top with cracker crumbs and dot with margarine.
6. Bake at 325°F for 30 minutes or until set.