Italian Parmesan Sausage Ditalini Soup

Name: Italian Parmesan Sausage Ditalini Soup
Cuisine: European, Italian, Mediterranean
Ingredients: 1 lb Italian sausage, casings removed; 1 tosp olive oil; 1 small onion, diced; 2 garlic cloves, minced; 4 cups chicken broth; 1 cup heavy cream; 1 cup grated Parmesan cheese; 1 cup uncooked ditalini pasta; 1 can (14.5 oz) diced tomatoes, drained; 2 cups fresh spinach (or kale)