Cut the chicken breast into 1-inch bite-sized cubes and season with sea salt and black pepper.
In a small bowl, whisk together the coconut aminos, rice vinegar, minced ginger, minced garlic, red pepper flakes, and toasted sesame oil.
In a separate tiny bowl, mix the arrowroot powder with water to create a slurry.
Heat avocado oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, about 5-7 minutes.
Remove the chicken from the pan and set aside.
Add the broccoli florets to the same skillet with a splash of water, cover, and steam for 3 minutes until vibrant green and tender-crisp.
Return the chicken to the pan and pour the sauce over the mixture.
Stir in the arrowroot slurry and toss everything together for 1-2 minutes until the sauce thickens into a glossy glaze.