Macaroni and Cheese

Ingredients
1 cup dried elbow macaroni (I usually put in more)
1/4 cup chopped onion
1 tablespoon butter
1 tablespoon flour
pepper
3/4 cup milk
1 1/2 cups shredded American cheese (I use cheddar)

Instructions
Cook macaroni till tender but still firm. Drain well. Meanwhile, for cheese sauce, in a medium saucepan cook onion in butter till tender but not brown. Stir in flour and pepper. Add milk all at once. Cook and stir till slightly thickened and bubbly. Add cheese, stirring till melted. Stir in cooked macaroni; mix well. Cook over low heat for 3 to 5 minutes or till heated through, stirring frequently.

Source
Heidi Lawson/Better Homes and Gardens