Dice the chicken breast into small bite-sized pieces and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until it begins to shimmer.
Add the chicken to the pan and sear until golden brown and cooked through, approximately 5-6 minutes, then remove and set aside.
In the same pan, add the cauliflower rice, diced carrots, and frozen peas, sautéing for 3-4 minutes until the moisture from the cauliflower evaporates.
Stir in the cooked brown rice, minced garlic, and grated fresh ginger, tossing frequently for 2 minutes to toast the grains.
Return the cooked chicken to the pan and drizzle with coconut aminos and sesame oil, stirring until everything is well-combined and fragrant.
Garnish the dish with thinly sliced green onions and toasted sesame seeds before serving hot.