A sipaupu is a traditional Polynesian food preparation method involving the steaming of food, typically done in an underground oven called an umu. The process involves wrapping food items, often meat and vegetables, in leaves and placing them on heated stones in a pit, then covering them to cook slowly. This method imparts unique flavors and moisture to the food, making it a cherished culinary technique in various Pacific cultures. Sipaupu is often used during special occasions and gatherings.