Finely slice half a cup of red onions. Combine the pounded ingredients with the prawn. Fry this mixture in a small amount of oil until fragrant. When the rise is half cooked, remove pan from fire. Cool the water slightly.
Half fill the pitchers with rice, add one tablespoon of the fried sambal mixture.
Fill up the pitcher with rice. Serve hot from the steamer, or cold later on. Pitchers may be reheated by steaming them.