01 - 12 ounces rigatoni pasta
02 - 1 pound Italian sausage, casings removed
03 - 1 tablespoon olive oil
04 - 0.5 medium yellow onion, chopped
05 - 3 cloves garlic, minced
06 - 1 can (14 ounces) crushed tomatoes
07 - 0.5 cup heavy whipping cream
08 - 0.5 teaspoon Italian seasoning
09 - 0.25 teaspoon red pepper flakes
10 - Kosher salt, to taste
11 - Freshly ground black pepper, to taste
12 - 0.25 cup freshly grated Parmesan cheese, plus extra for garnish