Delicious! Followed the recipe as-is the first time and would not make any changes the next time except maybe to add some extra veggies. I baked the squash shells (vs microwave) so it took longer, but was great on a rainy Sunday. The recipe makes a lot but provided excellent lunch leftovers. I am picky about Alfredo sauces as they are usually heavy or oily, but this one was perfect - fresh and light. Will definitely make again.
I LOVED THIS! I made it with steam fresh broccoli, decreased the butter and cheese to lighten it up a little. I am making it again tonight. Instead of cornstarch, I used arrowroot because I am allergic to cornstarch. It worked great.