Cut the chicken breast into bite-sized cubes and place them in a bowl.
Toss the chicken with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar or bowl, whisk together the coconut aminos, rice vinegar, tomato paste, honey, garlic powder, and ginger powder to create the sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes per side until golden brown and crispy.
Add the chopped bell peppers, broccoli florets, and pineapple chunks to the skillet with the chicken.
Stir-fry for another 4-5 minutes until the vegetables are tender-crisp.
Pour the sauce over the chicken and vegetable mixture, tossing constantly for 1-2 minutes until the sauce thickens and glazes the ingredients.
Remove from heat and serve immediately.