Used a Jimmy Dean hot sausage roll. Only 1/4 teaspoon red pepper flakes. Added some roasted red pepper and 2T fresh basil because I had it and didn't add the fennel because I didn't have it. Also cooked the pasta separately because I was dealing with young ones and knew I would need to simmer it for a bit. Excellent. Even my 3 year old ate it and he doesn't eat anything. In the future, could add spinach at the end.
