Recipe Lontong Filled with Oncom

Lontong Isi Oncom is a traditional Indonesian dish with a perfect blend of flavors and textures. It combines the fragrant rice cake lontong with savory income filling, creating a satisfying and delicious dish. Here's how you can make this delightful dish at home:


For Lontong:

  • 500g rice, washed and soaked for 2 hours
  • Banana leaves, cut into squares (for wrapping)
  • Salt to taste

For Oncom Filling:

  • 200g oncom, crumbled
  • 2 cloves garlic, minced
  • 1 small onion, finely chopped
  • 2 red chilies, finely chopped
  • 1 tablespoon vegetable oil
  • Salt and pepper to taste

For Peanut Sauce (optional):

  • 150g peanuts, roasted and finely ground
  • 2 cloves garlic
  • 2 red chilies
  • 1 tablespoon tamarind paste
  • Salt and sugar to taste
  • Water as needed


  1. Prepare Lontong:

    • Drain the soaked rice and grind it into a smooth paste.
    • Add salt to taste and mix well.
    • Take a piece of banana leaf and spoon some rice paste onto it. Wrap it into a cylindrical shape and secure the ends with toothpicks.
    • Repeat until all the rice paste is used.
    • Steam the wrapped rice cylinders for about 1 hour until cooked through. Allow to cool before slicing into rounds.
  2. Prepare Oncom Filling:

    • Heat oil in a pan over medium heat. Add garlic and onion, and sauté until fragrant.
    • Add crumbled oncom and chopped red chilies. Cook until the oncom is heated through and well combined with other ingredients. Season with salt and pepper to taste.
  3. Make Peanut Sauce (Optional):

    • Grind peanuts, garlic, and red chilies into a smooth paste.
    • Dilute the paste with water until desired consistency is reached.
    • Add tamarind paste, salt, and sugar to taste. Mix well.
  4. Assemble Lontong Isi Oncom:

    • Take a slice of lontong and place a spoonful of oncom filling in the center.
    • Serve with peanut sauce on the side, if desired.


  • To enhance the flavor of oncom filling, you can add grated coconut or kecap manis (sweet soy sauce).
  • Make sure to wrap the lontong tightly in banana leaves to prevent them from falling apart during steaming.
  • Adjust the amount of red chilies according to your spice preference.


  • Instead of oncom filling, you can use other fillings such as rendang, chicken curry, or vegetables for a vegetarian option.
  • Experiment with sauces like soy sauce-based or sambal for a spicy kick.

Nutritional Information:

  • The calorie content of Lontong Isi Oncom can vary depending on the portion size and ingredients used. On average, one serving of Lontong Isi Oncom with peanut sauce contains approximately 300-400 calories.


Lontong Isi Oncom is a flavorful Indonesian dish that is perfect for any occasion. Its combination of fragrant rice cake and savory oncom filling is sure to tantalize your taste buds. Whether served with peanut sauce or enjoyed alone, this dish is a delightful addition to any meal. So why not make Lontong Isi Oncom at home today and treat yourself to a taste of Indonesia?


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