Minestrone with Turkey Sausage Meatballs

Name: Minestrone with Turkey Sausage Meatballs
Ingredients: 1/2 lb. turkey sausage, casings removed; 1 large egg; 1/2 c. fresh parsley, chopped; 1/2 c. grated Parmesan, plus more for serving; 1/4 c. panko breadcrumbs; 2 tsp. extra-virgin olive oil; 1 large onion, chopped; 3 Carrots, peeled and chopped; 3 celery stalks, chopped; 4 garlic cloves, minced; kosher salt; Black pepper; 1 15-oz. can cannellini beans, drained and rinsed; 32 oz. low-sodium chicken broth; 28 oz. crushed tomatoes; 1 c. short-cut pasta (such as penne, ziti, or shells); 2 c. fresh spinach