Heat a large skillet or wok over medium-high heat and lightly coat with avocado oil spray.
Add the diced chicken breast to the hot pan, seasoning with sea salt and black pepper, and cook until golden and no longer pink.
Push the chicken to the outer edges of the pan and add the diced white onion, minced garlic, and grated ginger to the center.
Sauté the aromatics for 1 minute until fragrant, then stir in the frozen peas and carrots mix.
Add the cooked brown rice to the skillet, breaking up any clumps, and drizzle with the sesame oil and coconut aminos.
Toss all ingredients together for 2 minutes to allow the rice to toast slightly and absorb the flavors.
Push the rice mixture to one side, crack the egg into the empty space, scramble until just set, then fold it into the rice.
Remove from heat, garnish with thinly sliced green onions, and serve immediately.