Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the diced chicken breast, sea salt, and black pepper to the pan, sautéing until the chicken is golden brown and cooked through.
Push the chicken to the outer edges of the pan and add the diced white onion and the frozen peas and carrots blend to the center.
Sauté the vegetables for 3-4 minutes until the onions are translucent and the peas are tender.
Stir in the minced garlic and fresh ginger, cooking for about 60 seconds until the mixture becomes highly aromatic.
Push all ingredients to the sides of the pan, crack the egg into the center, and scramble it quickly until just set.
Add the chilled cooked brown rice, coconut aminos, and toasted sesame oil to the skillet.
Toss all ingredients together over high heat for 2 minutes, allowing the rice to toast slightly and absorb the flavors.
Remove from heat and garnish with thinly sliced green onions before serving immediately.