You can use any type of chicken sausage you prefer. Sweet Italian, roasted garlic or sun-dried tomato and basil are all great options. If your chicken sausages have thick casings that are able to be removed then remove them before crumbling. If the casings are soft and crumble along with the sausage then just do that instead.
You can use any type of bell peppers you prefer. I don’t like green peppers so I used 1 red pepper and 1 orange pepper.