Does mac-and-cheese need butternut squash? Perhaps not. But it sure is good with it in there. Roasting the squash keeps it from adding too much extra liquid to the mix and deepens the sweetness it brings to the party. It's perfect for people who love butternut squash, but would like to try it in in something other than soupThis hearty recipe works as a main dish with a salad or as a side to a more elaborate holiday meal. You can make this ahead of time all the way through step six. Keep the dish covered and chilled up to overnight before baking.