Cut the chicken breast into bite-sized 1-inch cubes and season with sea salt and black pepper.
In a small bowl, whisk together the coconut aminos, toasted sesame oil, rice vinegar, raw honey, minced ginger, 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 cubes to the skillet and sear until golden brown and cooked through, about 5-6 minutes.
Remove the chicken from the pan and set aside.
Add the broccoli florets, sliced red bell pepper, and minced garlic to the same pan, adding a splash of water if needed to steam the broccoli slightly.
Sauté the vegetables for 3-4 minutes until they are tender-crisp.
Return the chicken to the pan and pour the sauce over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the chicken and vegetables in a glossy glaze.
Serve the stir-fry immediately over the warm cooked brown rice.