Hot and Sweet Italian Sausages in Tomato Sauce

Name: Hot and Sweet Italian Sausages in Tomato Sauce
Ingredients: 1/2 pound hot Italian sausage, removed from casings and crumbled; 1/2 pound sweet Italian sausage, removed from casings and crumbled; 1 1/2 cups sliced red onions; 1 1/2 tablespoons chopped garlic; 3/4 teaspoon fennel seeds; 1/2 teaspoon salt; 1/2 teaspoon crushed red pepper; 1 (28-ounce) can whole peeled tomatoes, crushed by hand, with their juice; 2 tablespoons tomato paste; 1 tablespoon chopped fresh oregano; 1 pound dry penne, ziti or mostaccioli; 1 1/2 cups fresh ricotta, or crumbled or coarsely grated fresh ricotta salata; 6 tablespoons chopped fresh basil leaves; Grated Parmesan, for garnish