For cooking, forget the giant pumpkins that are meant for life as jack o’lanterns. The flat, lesser known heirloom variety called the Long Island cheese pumpkin is the prizewinner. This sweet, beige pumpkin gets its name from its resemblance to a wheel of cheese. Making pumpkin soup is a go-to way to prepare the fruit. As with any soup, the key is the quality of stock used. It should add flavor, but not too much or it will eclipse the taste of the pumpkin. Vegetable stock is the best choice here.