Pat the chicken breast dry with paper towels and cut into 1-inch cubes.
In a medium bowl, toss the chicken with arrowroot starch, sea salt, and black pepper until evenly coated.
Heat avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook for 5-6 minutes, turning occasionally, until the edges are golden and crispy.
Remove the chicken from the pan and set aside.
In the same pan, add the sliced bell peppers and snap peas, sautéing for 3-4 minutes until tender-crisp.
Stir in the minced garlic, ginger, and pineapple chunks, cooking for another minute until fragrant.
In a small jar, whisk together coconut aminos, rice vinegar, honey, and sesame oil.
Return the 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.