Cut off the ends of your squash

Using a coring tool, core out the seeds/guts of the squash to where you have enough room to shovel Mr. Sausage in there

Plop cored squash onto baking sheet (along with any other veggies you want to roast for the meal) and bake for about 40 minutes in the oven

Shovel the sausage into the squash (this is pretty fun, honestly)

Shove cheese into any nooks/crannies in the squash around the sausage

Bake for ten more minutes

Slice against the squash (see pic) using sharp knife

Serve with marinara sauce