Dice the chicken into small, uniform pieces and season with sea salt and black pepper.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add chicken to the pan and cook until golden brown and cooked through, then remove and set aside.
In the same pan, add minced garlic and grated ginger, sautéing for 30 seconds until fragrant.
Add the frozen peas and frozen carrots, cooking for 2-3 minutes until tender-crisp.
Push vegetables to the side, crack the egg into the center, and scramble until just set.
Stir in the cooked brown rice, cooked chicken, tamari, and toasted sesame oil.
Toss everything together for 2 minutes until the rice is slightly crispy and well-coated.
Garnish with sliced green onions and serve immediately.