Sausage, Pepper, Mushroom Fettuccine

olive oil

mild Italian sausages, cut into slices (I used 4 links)

bell peppers, red, yellow and orange, cut into quarter inch slices

medium onion, cut in half and sliced

mushrooms, sliced

whipping cream or half and half

fettuccine

Salt and freshly ground black pepper

freshly grated Parmesan cheese, plus extra for serving