In a large bowl, combine the egg, cheese, bread crumbs, onion, 1/4 teaspoon salt, 1/4 teaspoon pepper and 1/4 teaspoon garlic powder. Crumble beef over mixture and mix well. Shape into 1-in. balls.

In a Dutch oven, brown meatballs in small batches; drain. Add the broth, spinach, onion powder, parsley and remaining salt, pepper and garlic powder; bring to a boil. Reduce heat; simmer, uncovered, for 5 minutes. Stir in pasta; heat through. Yield: 12 servings (3 quarts).