Heat a large skillet or wok over medium-high heat and add half of the toasted sesame oil.
Season the diced chicken breast with sea salt and black pepper, then sauté in the skillet until golden brown and cooked through.
Remove the chicken from the pan and set aside; add the remaining sesame oil to the hot pan.
Pour in the whisked egg, scrambling quickly until just set, then remove and set aside with the chicken.
Add the minced garlic, grated ginger, and frozen peas to the pan, sautéing for 2-3 minutes until the vegetables are tender.
Stir in the chilled cooked brown rice, breaking up any clumps with a spatula, and cook for 3-4 minutes until the rice begins to crisp slightly.
Return the cooked chicken and scrambled eggs to the pan, pour in the coconut aminos, and toss everything together until well combined and heated through.
Garnish the dish with sliced green onions before serving warm.