Dice the chicken breast into small, uniform bite-sized pieces and season evenly with garlic powder, ground ginger, sea salt, and black pepper.
Heat the avocado oil in a large cast-iron skillet or stainless steel wok over medium-high heat until the oil is shimmering and hot.
Add the seasoned chicken to the skillet in a single layer and cook undisturbed for 3 minutes to develop a golden crust, then toss and cook for another 3 minutes until fully cooked.
Remove the chicken from the pan and set it aside on a plate, keeping the remaining juices in the skillet for extra flavor.
Add the frozen peas and carrots to the hot skillet, sautéing for 2 to 3 minutes until they are tender and slightly charred.
Push the vegetables to the outer edges of the pan and crack the egg into the center, scrambling it quickly with a spatula until it is just set.
Return the cooked chicken to the pan along with the cooked jasmine rice, coconut aminos, and toasted sesame oil.
Stir-fry everything together over high heat for 3 to 4 minutes, pressing the rice down occasionally to allow it to crisp up against the bottom of the pan.
Remove from heat and garnish the dish with sliced green onions and sesame seeds before serving hot.