In a large, deep skillet, heat 1 to 2 teaspoons oil over medium-high heat. Once the oil is hot, add the onions and cook for about 7 to 9 minutes, stirring occasionally, until they’re nicely browned and caramelized. Sprinkle with ¼ tsp salt and pepper. When the onions are done, transfer them to a bowl and set aside.

Reapply 1 to 2 teaspoons oil to the skillet and repeat the same process for peppers. You may need to do this in 2 batches if your pan isn’t large enough to hold all the peppers. Once the peppers are done, transfer to the bowl with the onions and set aside.

Reapply the remaining oil to the skillet and add chicken pieces. Sprinkle with ½ tsp salt and ½ tsp pepper. Sauté the chicken using a spatula until it’s almost cooked. Then add ¼ cup of the soy sauce and cook a few more minutes until the chicken is done.

Lower flame to medium, add the cooked onions and peppers to the skillet with the chicken, along with the remaining ¼ cup soy sauce. Mix everything together and continue to sauté over medium flame for about 5 minutes. Garnish with optional sesame seeds and scallions and serve!