In a large bowl, beat eggs. Add oats, milk, onion, salt, pepper and garlic powder. Add the ground beef; mix well. Shape into 4 cm balls. Place in two 13x9x2 inch baking pans. Bake, uncovered, at 190ºC or 30 minutes. Remove from the oven and drain. Place all of the meatballs in one of the pans. In a saucepan, bring all sauce ingredients to a boil. Pour over meatballs. Return to the oven and bake, uncovered, for 20 minutes or until meatballs are done. Yields: 4 dozen