In a small bowl, whisk together the coconut aminos, rice vinegar, honey, minced ginger, minced garlic, and arrowroot powder until smooth.
Dice the chicken breast into bite-sized cubes and season evenly with sea salt and black pepper.
Heat the sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside on a plate.
In the same skillet, add the chopped red and green bell peppers, yellow onion, and pineapple chunks.
Sauté the vegetables and fruit for 3-4 minutes until the peppers are crisp-tender and the pineapple begins to caramelize.
Return the chicken to the skillet and pour the prepared sauce over the mixture.
Stir constantly for 1-2 minutes until the sauce thickens and creates a glossy glaze over the chicken and vegetables.
Serve the sweet and sour chicken immediately over the warm cooked white rice.