Mom's Macaroni and Cheese

Ingredients
2 - 3 cups of uncooked ziti
1 1/2 cup of butter
2 small onions chopped (apx 1/2 cup)
1 teaspoon salt
1/2 teaspoon pepper
1 1/2 cup of all purpose flour
2 1/2 cups of milk
8 oz of sharp cheddar (finely shredded is best)
8 oz of Kraft Parmesan / Romano mixture

Breadcrumb Topping
2 sleeves of Ritz crackers
2 sticks of butter

Directions
Cook macaroni as directed per package. Cook and stir butter, onion, salt & pepper over medium heat until the onion is slightly tender. Stir in the flour. Cook over low heat, stirring constantly, until mixture is smooth and bubbly; remove from heat. Stir in the milk. Heat to boiling, stirring constantly. It is important to stir constantly. Boil and stir 1 minute; remove from heat. Stir in cheese until melted.

Place macaroni in ungreased 3 quart casserole dish. Stir cheese sauce into macaroni.

Directions Breadcrumb
crush up 2 sleeves of Ritz crackers (until a fine powder)
Melt 2 sticks of butter
mix in Ritz crackers and sprinkle on top of macaroni

Bake uncovered in 375 degree oven for 30 minutes