Slice sausage into 1/4″ rounds. In a deep skillet over med-high heat, add olive oil, chopped onions and sausage; saute for 5 minutes. Add garlic and cook for 1 minute, stirring often. Add sun-dried tomatoes, penne, chicken broth, heavy whipping cream and crushed red pepper. Turn heat to high.
Bring to a boil and reduce to a simmer. Then stir, cover and simmer for 11-12 minutes. Add cheese, parsley and serve hot.