Dice the chicken breast into small, even bite-sized pieces and season with sea salt and black pepper.
Heat a large non-stick skillet over medium-high heat and add half of the sesame oil.
Add the chicken to the skillet and cook until golden brown and cooked through, about 5-6 minutes, then remove from the pan and set aside.
In the same skillet, add the remaining sesame oil along with the diced white onion, minced garlic, and grated ginger, sautéing until fragrant.
Stir in the frozen peas and carrots, cooking for 2-3 minutes until tender.
Push the vegetables to one side of the skillet and crack the egg into the empty space, scrambling it until fully set.
Add the cooked brown rice and the cooked chicken back into the skillet, tossing everything together.
Drizzle the coconut aminos over the mixture and stir-fry for another 2 minutes until the rice is slightly crispy and everything is well combined.
Garnish with sliced green onions before serving warm.