Preheat oven to 425 Degrees and set a rack in the middle. Line a large baking sheet with parchment paper or foil
Using a pizza cutter or sharp knife, score the flesh of the squash in diagonal cuts, about an inch apart, in both directions. Be care not to cut through the skin.
In a small bowl, mix together the butter, maple syrup, Spicy Beer Mustard or Buzz Savories Honey Mustard, salt and a few grinds of pepper
Place the squash halves, cut side up on the baking sheet and spread with the glaze. Roast until tender, 40-45 minutes for Butternut squash and 25-30 minutes for honeynut squash. It should be quite soft when pricked with a fork.