Start by cutting the top off the squash in half and removing the seeds
Coat with cooking spray.
Place on a baking sheet with the tops and roast for 45 minutes
Remove any cooking liquid and season with salt & pepper.
Transfer to an oven safe serving dish. Stuff each one with a generous mound of the mac and cheese and top with shredded cheese.
Place under the broiler for a few minutes to melt & brown the cheese.
Serve hot.
Notes
I use a cooking spray to coat the squash. I do this because, in my experience, squash tends to absorb oil like a sponge which can make it greasy. I also don’t season it because salt takes the moisture out of foods and sometimes a lot of liquid comes out of squash when cooked.