Dice the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
Heat a large non-stick skillet or wok over medium-high heat and add half of the toasted sesame oil.
Add the chicken to the pan and sear until golden brown and cooked through, approximately 5-6 minutes, then remove and set aside.
Add the remaining sesame oil to the same skillet along with the diced white onion and frozen peas and carrots.
Sauté the vegetables for 3-4 minutes until the onions are translucent and the vegetables are tender.
Stir in the minced garlic and grated fresh ginger, cooking for 30 seconds until the mixture is fragrant.
Push the vegetable mixture to one side of the pan, crack the egg into the open space, and scramble until fully set.
Incorporate the cooked brown rice and the prepared chicken back into the skillet, drizzling the tamari over the top.
Toss everything together, then press the rice firmly into the bottom of the pan and cook undisturbed for 2 minutes to create a crispy texture.
Garnish the dish with sesame seeds and serve immediately while hot.