Fa'aifu is a staple Samoan sauce that is mostly used for dressing up fruits such as breadfruit and green bananas or starchy roots such as taro, yams, potatoes, cassava, and sweet potatoes. The sauce consists of coconut milk, a bit of salt, and chopped onions.

The concoction is then boiled and poured over the aforementioned ingredients that can be consumed as a flavorful appetizer or a snack.