Dice the chicken breast into small, bite-sized pieces and season with the sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook until golden brown and cooked through, approximately 5-6 minutes. Remove chicken from the pan and set aside.
In the same skillet, crack the egg and scramble quickly until just set, then remove and set aside with the chicken.
Add the sesame oil to the pan, followed by the minced garlic, grated ginger, and the white parts of the sliced green onions. Sauté for 30 seconds until fragrant.
Add the frozen peas and carrots to the skillet, stirring for 2 minutes until thawed and tender.
Incorporate the cooked brown rice, pressing it down to get a slight crisp, then add the tamari and stir everything together.
Return the cooked chicken and scrambled egg to the pan, tossing well to combine and heat through.
Garnish with the green tops of the sliced onions before serving.