Translated from "Atrévete a cocinar" by Karlos Arguiñano. This is a quick and easy recipe, and the soup is perfect for a chilly autumn or winter day. NOTE: The most common squash is Spain are large butternut-shaped gourds, green on the outside and bright orange on the inside, and are bigger than most people shopping in the city can carry. Seriously they look like the Incredible Hulk's forearms. So people tend to buy squash in slices. Acorn or pumpkin should do the trick, though I admit the Spanish variety is much easier to peel and slice.