Gado-gado is widely sold in almost every part of Indonesia, with each area having its own modifications.[1] It is thought to have originally been a Sundanese dish, as it is most prevalent in Western parts of Java (which includes Jakarta, Banten, and West Java provinces). The Javanese have their own slightly similar version of a vegetables-in-peanut-sauce dish called pecel which is more prevalent in Central and East Java. Gado-gado is widely available from hawkers' carts, stalls (warung) and restaurants and hotels in Indonesia; it is also served in Indonesian-style restaurants worldwide. Though it is customarily called a salad, the peanut sauce is a larger component of gado-gado than is usual for the dressings in Western-style salads; the vegetables should be well coated with it.
The key to a delicious gado-gado is the sauce made of fried crushed savory peanuts, sweet palm sugar, garlic, chilies, salt, tamarind and a squeeze of lime.[1] Formerly, gado-gado sauce was generally made to order, sometimes in front of the customers to suit their personal preference for the degree of spiciness, which corresponds to the amount of chili pepper included. However, particularly in the West, gado-gado sauce is often prepared ahead of time and in bulk. Gado-gado sauce is also available in dried form, which simply needs to be rehydrated by adding hot water.