Super-Fast Meat Loaf A combination of microwaving and baking turns out delicious meat loaf in less than 30 minutes! It's the perfect supper for these early autumn evenings when the kids are back in school and time is tight. 1 1/2 pounds ground beef 1 cup water 3/4 cup seasoned stuffing mix 1 envelope onion soup mix 1/2 cup ketchup 1/4 cup firmly packed light brown sugar 2 teaspoons Dijon-style mustard