Dice the chicken breast into bite-sized pieces and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar, whisk together coconut aminos, rice vinegar, raw honey, minced ginger, minced garlic, and red pepper flakes to create the sauce.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes until golden brown and cooked through, then remove and set aside.
In the same skillet, add the broccoli florets and sliced red bell pepper with a splash of water, covering for 2 minutes to steam-tenderize.
Return the chicken to the pan and pour the sauce over the mixture, tossing constantly for 1-2 minutes until the sauce thickens and glazes the ingredients.
Remove from heat, drizzle with toasted sesame oil, and serve over the warm cooked brown rice.