Omit the olive oil and instead spray the pan and vegetables with olive oil-flavored cooking spray to reduce the calories to 90 and the fat to 0 grams per serving.
Butternut squash resembles the shape of a light bulb or pear--it's wider at one end. It usually weighs between 2 and 3 pounds and has a golden yellow to caramel-colored shell. You can also use about 1 1/2 pounds of other winter squash, such as Hubbard or buttercup.
Sweet potatoes with darker-colored skins are generally more moist and flavorful than the lighter ones.
Cut off bottom and stem ends of squash. Cut the narrow part (neck) off and cut the rounded bottom in half.