Cook rice cake as the instruction of the bag, drain, set aside, wait until it cool down a bit, then you can make slices out of it, otherwise it will be too hot to touch.
In a plate, put 1/4 - 1/2 package of the Sambel Pecel, mix well with lukewarm water, not too watery. Add in 2-3 tablespoons of sweet soy sauce, stir well.
Meanwhile wash clean chicken breast, and cut cubes as desire.
Place each cubes in the skewers. Marinade the chicken on skewers with the mixed Sambel Pecel with sweet soy sauce and water.
Peel and wash clean onion. Cut as desired and place in the skewers.
Grill satay and onion until well cooked. Occasionally turn the satay and brush with oil+sweet soy sauce.
Serve with cut/sliced rice cake