Marinate the meat with the egg, soy sauce, and white pepper for 15 minutes.

Coat the meat pieces with sweet potato starch and let sit for 10 minutes to absorb moisture.

Heat oil in a pan and fry the meat pieces until cooked through, then remove them from the oil.

In a separate pan, heat oil and stir-fry the onion and bell peppers. Add the prepared sauce to the pan and mix with the vegetables, then add the meat pieces. Let the beautiful color coat the meat! Done!