Pat the diced chicken breast dry and season with sea salt and black pepper.
Heat a large skillet or wok over medium-high heat and add the avocado oil.
Add the chicken to the hot pan and sear for 5-6 minutes until golden brown and cooked through, then remove and set aside.
Lower the heat to medium and add the toasted sesame oil, minced garlic, and grated ginger, sautéing for 30 seconds until fragrant.
Add the diced carrots and frozen peas to the pan, stir-frying for 3 minutes until the vegetables are tender-crisp.
Push the vegetables to the side of the pan and pour in the whisked egg, scrambling it quickly until just set.
Incorporate the chilled brown rice and cooked chicken back into the pan, breaking up any rice clumps with a spatula.
Drizzle the tamari over the mixture and increase the heat to high, pressing the rice down and letting it sit for 1 minute to develop a crispy texture.
Toss everything together one last time and serve immediately, garnished with sliced green onions and sesame seeds.