Preheat the oven to 375 degrees. Add a 1/4 inch of water to a large baking pan.
Cut the squash in half lengthwise then clean out the seeds with a spoon. Rub the butter equally into each squash half. Season with a touch of sea salt and freshly cracked pepper then sprinkle each half equally with the brown sugar. Place into the prepared baking dish then cover with tin foil.
Place the pan into the oven and bake for 30 minutes, or until tender. Remove the tin foil then turn the oven to broil; cook,watching carefully, for a few minutes or until the sugar starts to caramelize. Remove from the oven and serve immediately. Enjoy.