1/2 lb. ground hamburger
1/4 c. chopped onions
1 2/3 c. spaghetti sauce
6 oz. spaghetti, cooked
2 tbsp. butter
4 tsp. flour
1/4 tsp. salt
3/4 c. milk
1/3 c. water
1 c. or 4 oz. cheese
2 tbsp. grated Parmesan cheese

Mix together. Bake 350 degrees, 20 minutes.