1. In a medium bowl combine egg white, bread crumbs, onion, garlic powder, and pepper. Add ground beef; mix well. Shape meat mixture into thirty-six ¾-inch meatballs.

2. Lightly coat a large skillet with cooking spray. Cook meatballs over medium heat about 8 minutes or until no pink remains, turning occasionally to brown evenly. Set meatballs aside.

3. Meanwhile, in a large saucepan stir together broth, undrained tomatoes, garbanzo beans, mushrooms, and water. Bring to boiling; add pasta. Return to boiling; reduce heat. Simmer, covered, for 10 to 12 minutes or until pasta is tender. Stir in meatballs and spinach. Cook for 1 to 2 minutes more or just until fresh spinach wilts or frozen spinach is heated through.