Lasagna Soup with Ricotta and Basil

Name: Lasagna Soup with Ricotta and Basil
Ingredients: 2 cups (2 oz./60 g) stemmed fresh spinach; 1/2 lb. (250 g) fusilli pasta; 1/2 lb. (250 g) sweet Italian sausage; 5 Tbs. grated Parmesan cheese; Kosher salt and freshly ground pepper; 2 Tbs. olive oil; 1/2 small yellow onion, chopped; 2 garlic cloves, minced; 4 cups (32 fl. oz./1 l) low-sodium chicken broth; 1 can (14 1/2 oz./455 g) diced fire-roasted tomatoes; 2 Tbs. tomato paste; 1 cup (1/2 lb./250 g) whole-milk ricotta; 1/2 cup (2 oz./60 g) shredded mozzarella; 6 fresh basil leaves, chopped