We loved this recipe!!! I did not have Italian sausage so I used ground beef. I also baked my squash in the oven instead of microwaving, just a personal preference. I really love all the onions and peppers in this recipe really gives this a great flavor!!! When I stuffed the squash mixture back into the shells I added a layer of squash mixture with Parmesan cheese with more squash mixture and cheese. Next time I want to try Mozzarella cheese. This will be a keeper used many times because of its Deliciousness and ease to prepare. Thanks!!!