In a large bowl, combine the ground beef, rice, chicken broth, egg, parmesan cheese, onion, garlic, onion salt, and pepper. Mix well. Form into 1 & 1/2 inch meatballs. Place the meatballs in a baking dish. In a medium bowl mix together tomato sauce, Worcestershire, and brown sugar. Pour the sauce over the meatballs and cover the baking dish with foil.