In a small bowl, whisk together the coconut aminos, rice vinegar, tomato paste, honey, arrowroot starch, minced ginger, and minced garlic until smooth.
Dice the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5-7 minutes, then remove and set aside.
In the same skillet, add the diced bell peppers, red onion, and pineapple chunks, sautéing for 3-4 minutes until the vegetables are crisp-tender.
Return the cooked chicken to the skillet and pour the prepared sauce over the mixture.
Toss everything together constantly for 1-2 minutes until the sauce thickens into a glossy glaze that thoroughly coats the chicken and vegetables.
Serve immediately while hot and the glaze is at its most vibrant.