Heat oven to 400°F. In small bowl, stir together oregano, basil, garlic powder, lemon peel and black pepper. Reserve 3/4 teaspoon of mixture; set aside. In large bowl, mix ground beef, bread crumbs, onion, milk, egg, salt and remaining seasoning mix until thoroughly combined. Form into sixteen 2-inch meatballs. Pour soup into ungreased 13x9-inch (3-quart) glass baking dish; top with meatballs.