Chili Sauce
In a large skillet, combine chili powder, garlic salt, molasses, cumin, oregano and tomato juice. Stir until blended. Set aside on stovetop.
Meatballs
In a large mixing bowl, combine ground beef, rice, onion, green pepper, celery, egg, mustard, salt and pepper. Blend well (mixing with hands works best). Shape into 2-inch-diameter balls.
Place meatballs in sauce. Bring liquid to a boil, then reduce heat and cover. Simmer for 30 minutes or until meatballs are cooked through. Turn meatballs in sauce once during cooking. To test doneness, cut into one meatball. If there is no pink left, meatballs are done. Serve.