Have you ever tried rujak gobet? It is common food in Malang that the people usually have several kinds of rujak. Let's say rujak cingur, rujak manis, rujak serut or rujak gobet, and others. The price is also cheap, you can get a portion for 10 thousands rupiahs. Rujak is like fruit salad with local sauce. If you want to make it, I'll try to give you the recipe: Fruits: a mango, a cucumber, a pineapple, a Mexican turnip, and other fruits you like. Clean it and grate it. Sauce: brown sugar, tamarind, salt, chilies, fermented shrimp (terasi), fried peanuts. Grind it and pour some water. For serving, mix the grated fruit with the sauce. It will be tastier when it is served cold.