Bring a large pot of salted water to a boil. Add the pasta and cook according to the package directions. Drain and set aside.

In a large saucepan, brown the sausage until no longer pink. Remove from pan.

If desired, sweat the optional onions and mushrooms in a little butter in the same pan.

Add the cream, chicken broth, Parmesan cheese, garlic powder, red pepper, and rosemary to the pan.

Simmer for 10 minutes or until mixture is desired thickness.

Add the spinach back to the pan for a few minutes to wilt down.

Add the sausage back into the cream.

Serve over pasta of your choice.