One Pot Sausage Pasta

Bahan-bahan (8 porsi)

• 1 tablespoon olive oil
• 1 pound sweet Italian sausage, (casings removed)
• 1 medium yellow onion, (peeled and diced)
• 2 teaspoons dried oregano
• ½ teaspoon fennel seeds
• One pinch red pepper flakes
• 2 medium garlic cloves, (minced)
• kosher salt and freshly ground black pepper
• One 28-ounce can tomato puree
• 2 tablespoons tomato paste
• 4 cups (1 quart) low sodium chicken broth
• 1 pound fusilli pasta
• ⅓ cup mascarpone cheese
• 1½ cups grated mozzarella cheese
• ¼ cup Parmesan shavings ((plus more, for serving))
• 10 to 12 fresh basil leaves ((plus more, for serving))