Season the diced chicken breast evenly with sea salt, black pepper, garlic powder, and ground ginger.
Heat the avocado oil in a large skillet or wok over medium-high heat until it begins to shimmer.
Add the chicken to the skillet and cook until golden brown and fully cooked through, approximately 5 to 7 minutes.
Remove the chicken from the pan and set it aside on a clean plate.
In the same skillet, add the diced carrots and frozen peas, sautéing for 3 to 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 quickly until fully set.
Add the cooked brown rice, tamari, and the reserved chicken back into the skillet with the vegetables and egg.
Stir-fry all ingredients together for 2 to 3 minutes until the rice is heated through and develops a slightly crispy texture.
Garnish the dish with sliced green onions and serve immediately.