Pecel is a traditional Indonesian food that uses chili peanut sauce. The origin of pecel is unknown, and many cities claim to be the creators of pecel. However, the most likely origin of pecel is in the regency of Madiun in East Java. It is guessed that Pecel originated in the city of Ponorogo, because Ponorogo Chicken Sate uses the same kind of peanut sauce that is normally used in Pecel. It is also similar to the sauce used in Gado-gado.
Source : http://en.wikipedia.org/wiki/Pecel
Picture from Info Kuliner