Macaroni Bake

Ingredients:

2 cups dry elbow macaroni, cooked and drained ($.99 for entire box,
so at most $.50)
1 small onion, diced (pennies)
1 small green bell pepper, diced (free from my garden, or about $.35
from local Farmer's market)
1/2 stick of margarine (pennies)
1 can tomato soup ($.33 on sale)
2 slices of American cheese singles, cut in half diagonally (whole
package of 16 singles, store brand, on sale for $.99, so pennies)
Grated parmesan cheese (optional, as topping)

Directions: 

Cook and drain macaroni, set aside. Sautee onions and peppers in margarine until tender. Add vegetables to macaroni and mix lightly. Stir in soup. Pour mixture into a lightly oiled casserole dish and arrange cheese singles over top. Bake in 350F degree oven until heated through and cheese is melted (about 15 mintues). Sprinkle with parmesan cheese before serving. Serves 4.

Approximate cost, $1.50 for the whole casserole.