Lontong is an Indonesian dish made of compressed rice cake in the form of a cylinder wrapped inside a banana leaf, commonly found in Indonesia, Malaysia and Singapore. Rice is rolled inside a banana leaf and boiled, then cut into small cakes as a staple food replacement of steamed rice. The texture is similar to those of ketupat, with the difference being that the ketupat container is made from woven janur (young coconut leaf) fronds, while lontong uses banana leaf instead.
It is commonly called nasi himpit (lit. "pressed rice") in Malaysia, despite being created using other methods.
Arem-arem is a smaller version of lontong, filled with vegetables and occasionally meat, eaten as a snack.
The dish is usually served hot or at room temperature with peanut sauce-based dishes such as gado-gado, karedok, ketoprak, other traditional salads, and satay. It can be eaten as an accompaniment to coconut milk-based soups, such as lontong sayur, soto, gulai and curries. It is also used as an alternative to vermicelli noodles.
The origin of lontong is from ketupat. Both are made from the main ingredient of steamed rice in a banana leaf wrapper or young coconut leaf. Initially lontong was only considered as ordinary food. However, after the spread of Islam to Java, the tradition of eating lontong and ketupat began. Sunan Kalijaga was the first to introduce lontong to Javanese people, including ketupat. This is part of the da'wah carried out by Sunan Kalijaga at that time. Lontong is often served with Gulai sauce and vegetables, chayote, tempeh, tofu, tauco, boiled egg, sambal, and krupuk crackers.
Lontong is traditionally made by boiling the rice until it is partially cooked and packing it tightly into a rolled-up banana leaf. The leaf is secured with lidi semat, wooden needle made from the central rib of coconut leaf, and cooked in boiling water for about 90 minutes. Once the compacted rice has cooled, it can be cut up into bite-sized pieces. Outer parts of lontong usually have greenish color because of the chlorophyll left by banana leaf rubbing off on rice cake surface.