1 cup dried macaroni (or whatever pasta you prefer)
1/2 cup chopped onion
1 tablespoon butter
1 tablespoon flour
dash pepper
3/4 cup milk
1 1/2 cups shredded cheese (such as velveeta, cheddar)
…..
Cook macaroni according to package directions. To make the sauce, saute onions in melted butter over med-hi heat. Add flour and stir till combined. Add milk and pepper and stir constantly until thickened, using a whisk. Once mixture is thick, add cheese and stir to melt. Add cooked macaroni and let stand 10 minutes before serving.