01 - Heat oven to 425°F and grease a standard muffin tin. Divide the measured tots among only as many wells as can hold four or five tots each; leave other wells empty.
02 - Bake ten minutes to soften, then use a spoon to press tots carefully over each base and partway up the sides. Bake about ten minutes more, until the shells hold their shape.
03 - Cook macaroni according to its package and drain. Brown the beef with onion and garlic powders, checking 160°F, then drain fat.
04 - Melt butter separately, stir in flour for about a minute, then whisk in milk gradually. Stir until thickened, lower heat and melt in cheddar.
05 - Combine sauce, macaroni and beef. Taste before seasoning. Spoon a modest amount into each potato cup; do not force all the filling into the available shells. Keep extra filling for serving alongside.
06 - Bake filled cups about ten minutes, continuing until centers reach 165°F. Let stand until firm enough to lift with a spoon. Add optional ketchup and pickles.