Dice the chicken breast into bite-sized cubes and season with sea salt and black pepper.
Heat the avocado oil in a large non-stick skillet or wok over medium-high heat.
Add the chicken to the pan and sear for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside.
In the same pan, add the broccoli florets and shredded carrots, sautéing for 3 minutes until tender-crisp.
Stir in the minced garlic and grated ginger, cooking for 30 seconds until highly aromatic.
Add the cold brown rice to the skillet, pressing it down slightly to allow the bottom to crisp for 2 minutes.
Return the chicken to the pan and drizzle with tamari and sesame oil.
Toss everything together for 1 minute to ensure the flavors are well combined and the rice is heated through.
Garnish with sliced green onions and sesame seeds before serving hot.