Wash the exterior of the squash just before using. Winter squash is best baked, but it can also be steamed or boiled. Cut butternut, acorn, or other winter squash in half lengthwise, scoop out and discard the seeds, and place squash halves, flesh-side-down, in a baking dish. Add 1/4-inch (0.6cm) of hot water, cover, and bake until tender. Scoop out flesh and purée with garlic, basil, and olive oil or butter. Winter squash can also be stuffed with seasoned bread cubes and seafood or cheese mixtures.