Cut the chicken breast sausage into bite-sized pieces.
Slice the onion and bell pepper thinly.
Heat olive oil in a pan and sauté the onions and bell peppers.
Add the chicken breast sausage and stir-fry together.
Pour in milk and cheese, and simmer until the sauce is well blended.
Add cooked pasta and toss well in the sauce.
Plate the pasta and garnish with parsley.