Cut the chicken breast into small, bite-sized pieces and season with sea salt and black pepper.
Heat avocado oil in a large non-stick skillet or wok over medium-high heat until shimmering.
Add the chicken to the pan and sauté until golden brown and cooked through, approximately 5-6 minutes, then remove and set aside.
In the same pan, add the diced carrots and frozen peas, cooking for 3 minutes until the carrots begin to soften.
Stir in the minced garlic and grated ginger, sautéing for 30 seconds until the mixture is highly fragrant.
Push the vegetables to one side of the pan, crack the egg into the empty space, and scramble until just set.
Add the chilled cooked brown rice and the cooked chicken back into the pan, spreading it out in an even layer.
Let the rice sit undisturbed for 2 minutes to allow the bottom to become slightly crispy, then toss to combine.
Drizzle the coconut aminos and toasted sesame oil over the mixture, stirring well to coat every grain.
Remove from heat and garnish with sliced green onions and sesame seeds before serving hot.