Combine 1# ground beef, seasoning mix, 1 egg, 2 Tbs. ketchup and 1/3 cup milk and hand mix well. For Patties: Form 4-5 patties (or desired number) and grill or pan-fry on stove until no longer pink inside. Top patties with cheese and ketchup and serve on a bun, as desired. For Meatloaf: Spread in a 9" x 5" loaf pan. Bake at 375 degrees for 40-45 minutes or until no longer pink inside. Drain fat. Top with cheese and ketchup, if desired, cook 5 minutes more or until cheese melts.