This rich and satisfying soup is filled with meatballs, pasta, and vegetables and simmered in the slow cooker to give the flavors all day to blend.
In a large bowl, stir together egg, beef, onion, bread crumbs, 1 tablespoon Parmesan, 1 tablespoon parsley and 1/4 teaspoon each of the salt and pepper. Form into 1-inch meatballs (about 45) and place on baking sheet; refrigerate while preparing soup.
Combine broth, carrots, escarole and oregano in slow cooker. Gently add meatballs. Cover and cook on LOW for 6 hours. Stir in pasta for last 20 minutes of cook time. Stir in remaining 1/2 teaspoon salt and 1/4 teaspoon black pepper. Sprinkle each serving with remaining parsley and Parmesan cheese and serve.