Italian Sausage Spaghetti Soup

Name: Italian Sausage Spaghetti Soup
Prep time: 10 min
Cook time: 40 min
Total time: 50 min
Cuisine: American, Italian
Ingredients: 2 tablespoons olive oil; 1 onion (diced); kosher salt, pepper, crushed red pepper flakes; 8 cloves garlic (minced); 1 pound ground Italian sausage (casings removed); 4 cups chicken broth; 1 (28-ounce) can crushed tomatoes; 2 tablespoons Italian seasoning; 6 ounces fresh spinach (chopped); 1 cup heavy cream; 4 to 5 ounces uncooked spaghetti (broken into inch pieces); 1/3 cup grated parmesan cheese