Cut the chicken breast into bite-sized cubes and thinly slice the red bell pepper and green onion.
In a small bowl, whisk together the coconut aminos, rice vinegar, arrowroot powder, and red pepper flakes to create the stir-fry sauce.
Heat a large non-stick skillet or wok over medium-high heat and add the sesame oil, swirling to coat the pan.
Add the chicken cubes 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, sugar snap peas, and red bell pepper with a splash of water, covering for 2 minutes to steam-soften.
Remove the lid and add the minced garlic and grated ginger, sautéing for 1 minute until highly aromatic.
Return the chicken to the skillet and pour the sauce over the mixture, tossing constantly for 1-2 minutes until the sauce thickens and coats everything.
Garnish with sliced green onions and serve immediately while the vegetables are still crisp and bright.