Cooking meatballs and hot sausage in tomato sauce; should I broil the sausage first?

I always bake the meatballs separately to get some of the fat out; don’t usually put sausage in. I thought I’d kick it up a notch today but am not sure whether to cook the sausage before putting it in the sauce or not. Your thoughts? (Don’t need a whole recipe as it is almost done.)