In a small bowl, whisk together the coconut aminos, rice vinegar, honey, arrowroot powder, minced ginger, minced garlic, and red pepper flakes to create the sauce.
Cut the chicken breast into bite-sized pieces and season lightly with sea salt.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sear until golden brown and cooked through, about 5-6 minutes.
Remove the chicken from the pan and set aside, then add the broccoli florets and diced red bell pepper with a splash of water to steam-sauté until tender-crisp.
Add the cauliflower rice to the pan and cook for 2 minutes until just softened.
Return the chicken to the pan and pour the sauce over the mixture, tossing constantly until the sauce thickens and coats everything evenly.
Garnish with sliced green onions and sesame seeds before serving hot.