Cut the chicken breast into bite-sized cubes and season with sea salt and black pepper.
In a small bowl, toss the chicken with arrowroot powder until each piece is lightly and evenly coated.
In another small bowl, whisk together the coconut aminos, rice vinegar, honey, toasted sesame oil, minced ginger, minced garlic, and red pepper flakes to create the sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside.
Add the broccoli florets and sliced red bell pepper to the same skillet with a splash of water, covering for 2 minutes to steam until crisp-tender.
Return the chicken to the pan and pour the sauce over the meat and vegetables.
Toss everything together for 1-2 minutes until the sauce thickens into a glossy glaze and coats every piece.
Serve immediately while hot from the pan.