Slow Cooker Minestrone Soup

Name: Slow Cooker Minestrone Soup
Prep time: 20 min
Cook time: 6 h
Total time: 6 h 30 min
Yield: 8
Ingredients: Ingredients; 1 tablespoon olive oil; 1 large onion, diced; 3 carrots, diced; 3 celery stalks, diced; 3 cloves garlic, minced; 1 can (28 oz) crushed tomatoes; 6 cups vegetable broth; 1 can (15 oz) kidney beans, drained and rinsed; 1 can (15 oz) cannellini beans, drained and rinsed; 1 cup ditalini pasta or small elbow macaroni; 2 medium zucchini, diced; 1 cup green beans, trimmed and cut into 1-inch pieces; 2 teaspoons dried basil; 1 teaspoon dried oregano; 1 teaspoon salt; 1/2 teaspoon black pepper; 2 bay leaves; 2 cups fresh spinach, chopped; 1/4 cup fresh parsley, chopped; Grated Parmesan cheese for serving