Cook the pasta according to package instructions, drain, and reserve. Rinse with cold water to prevent it from sticking.
While the pasta is cooking, melt two tablespoons of butter in a large skillet and brown the chicken until fully cooked.
Add the remaining tablespoon of butter, the sliced mushrooms, minced garlic, and shallots. Cook for about 5 minutes.
Deglaze the pan with the white wine and simmer until reduced by half.
Pour in the heavy cream and chicken broth. Add the red pepper flakes, dried sage, and pepper. Simmer until slightly thickened.
Mix in the crumbled gorgonzola cheese until melted, add a little salt if needed, and stir in the cooked pasta.
Serve with freshly grated parmesan cheese and freshly chopped parsley.