Cut the chicken breast into 1-inch cubes and toss in a bowl with arrowroot powder, sea salt, and black pepper until evenly coated.
In a small jar, whisk together the pineapple juice, apple cider vinegar, coconut aminos, tomato paste, and honey until smooth.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and cook for 5-6 minutes, turning occasionally, until golden brown and crispy.
Toss in the sliced bell pepper, onion, and sugar snap peas, stir-frying for 3-4 minutes until the vegetables are tender-crisp.
Add the minced garlic and grated ginger to the pan, sautéing for 30 seconds until fragrant.
Pour the prepared sauce over the chicken and vegetables, tossing constantly for 1-2 minutes until the sauce thickens and coats everything beautifully.
Remove from heat and serve immediately while the chicken is at its crispiest.