Pat the chicken breast dry and cut into 1-inch bite-sized cubes.
In a small bowl, toss the chicken cubes with arrowroot powder, sea salt, and black pepper until evenly coated.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the pan in a single layer and sear for 3-4 minutes per side until golden brown and crispy, then remove and set aside.
In the same pan, add the diced bell peppers, snap peas, and pineapple chunks, sautéing for 3 minutes until the vegetables are tender-crisp.
While the vegetables cook, whisk together the coconut aminos, rice vinegar, honey, minced ginger, and minced garlic in a small jar.
Return the chicken to the pan and pour the sauce over the mixture.
Stir constantly for 1-2 minutes until the sauce thickens and coats everything in a glossy glaze.
Serve immediately while hot and crispy.