This pumpkin soup is a traditional New Zealander dish that has many variations. It's most comonly prepared with a combination of puréed pumpkin, onions, lemongrass, butter, coconut milk, flour, egg yolks, nutmeg, and seasonings. The onions and lemongrass are sautéed in butter until soft, followed by the pumpkin purée that's added to the pot along with some water and freshly grated nutmeg.