Dice the chicken breast into small, uniform pieces and season with sea salt and black pepper.
Heat a large non-stick skillet or wok over medium-high heat with half of the toasted sesame oil.
Add the chicken to the skillet and cook until golden brown and cooked through, about 5-6 minutes, then remove and set aside.
In the same pan, add the remaining sesame oil along with the diced carrots, peas, garlic, and ginger, sautéing until fragrant and tender.
Push the vegetables to the side, crack the egg into the center, and scramble until just set.
Incorporate the cooked brown rice and the cooked chicken back into the pan, stirring to combine everything.
Drizzle with tamari and toss frequently for 2-3 minutes until the rice gets slightly crispy and everything is well-coated.
Garnish with sliced green onions and toasted sesame seeds before serving.