Slow Cooker Vegetarian Minestrone
1 (15 ounce) can kidney beans, drained 1 (28 ounce) can crushed tomatoes 1 cup green beans 1 large onion, chopped 1 small zucchini 1 tablespoon minced fresh parsley 1 teaspoon salt 1 ½ teaspoons dried oregano 2 large carrots, diced 2 ribs celery, diced 3 cloves garlic, minced 4 cups chopped fresh spinach 6 cups vegetable broth ¼ cup finely grated Parmesan cheese, or more … ¼ teaspoon freshly ground black pepper ½ cup elbow macaroni ¾ teaspoon dried thyme