Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Season the cubed chicken breast evenly with the sea salt and black pepper.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5 to 7 minutes.
Remove the cooked chicken from the skillet and set it aside on a plate.
In the same skillet, add the shredded green cabbage and sliced red bell pepper, sautéing for 3 to 4 minutes until the cabbage begins to soften but retains a slight crunch.
Stir in the minced garlic and grated fresh ginger, cooking for about 60 seconds until the mixture is highly fragrant.
Return the chicken to the skillet and pour in the coconut aminos and toasted sesame oil.
Toss all ingredients together for 1 to 2 minutes to ensure the chicken and vegetables are well-coated and glazed.
Remove from heat, garnish with the sliced green onions, and serve immediately.