Combine ground beef, ⅓cup ketchup, bread crumbs, egg, onion flakes, garlic salt, and pepper. Mix well. Shape into 1-inch meatballs. Place on jelly roll pan. Bake at 350° for 18 minutes, or until brown. Place in slow cooker.
Combine 1cup ketchup, brown sugar, tomato paste, soy sauce, vinegar, and hot pepper sauce. Pour over meatballs.