To make the toasted rice, add about 2 tablespoons of sweet sticky rice grains to a pan over medium heat. Toast until the grains have some color to them and become fragrant. Then add to a spice grinder and grind. If you don't have a spice grinder you can use a blender and then pour the rice through a strainer to remove any large pieces that may not have gotten blended. You want to end up with a fine powder.
Cook the ground chicken in a non-stick skillet with no oil. Cook thoroughly and keep the juices in the pan. If using Chicken breast add about 1/4 cup of water to make it juicer.
Once the chicken is cooked, remove from heat and stir in sliced red onions. The residual heat will wilt the onions.
Then add the toasted rice powder, lime juice, fish sauce, and Thai chili flakes. Taste it and add more lime, fish sauce, or chili if needed.
Finish by adding whole mint leaves and cilantro leaves. Serve with lettuce leaves, cucumbers, and or a side of rice.
Video on how to make toasted rice powder can be found Here.