Dice the chicken breast into 1-inch pieces and season evenly with garlic powder, ground ginger, sea salt, and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until the oil is shimmering.
Add the seasoned chicken to the pan and sauté for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside on a plate.
In the same pan, add the diced carrots and green peas, sautéing for 3-4 minutes until the carrots are tender-crisp.
Push the vegetables to the edge of the pan and crack the egg into the center, scrambling it with a spatula until fully set.
Add the cooked brown rice, cooked chicken, coconut aminos, and toasted sesame oil to the pan.
Stir-fry all ingredients together for 2-3 minutes until the rice is heated through and slightly toasted.
Garnish with sliced green onions and serve immediately while hot.