This question is the big debate. Some folks say if you wrap them in bacon and leave them in the fridge overnight that you do NOT need to par-boil the pasta. There is nothing more that I can't do than underdone pasta. I don't like chewing hard pasta. So I went ahead and boiled the noodles for just 4 minutes. Because cannelloni are thinner - if you use those - you might get by without boiling them first.