Slice sausage into bite-sized pieces.
Add olive oil to the pan and sauté onions and sausage.
Stir in garlic.
Add chicken broth, diced tomatoes, cream, and pepper. Stir till mixed well.
Add pasta. Make sure that the pasta is stirred into the sauce and covered with liquid.
Cover and simmer for 15-20 minutes.
Add 1 cup of cheddar cheese. Stir until melted.
Serve with additional cheese and sour cream if desired. Enjoy!