Cut the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Place the chicken in a bowl and toss with arrowroot powder until evenly coated.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook until golden brown and crispy on all sides, about 6-8 minutes, then remove and set aside.
In the same skillet, add the bell peppers, broccoli, and snap peas, sautéing for 4-5 minutes until tender-crisp.
While the vegetables cook, whisk together the coconut aminos, rice vinegar, pineapple juice, sesame oil, minced ginger, and minced garlic in a small bowl.
Return the crispy chicken to the skillet and pour the sauce over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the chicken and vegetables beautifully.