In a small bowl, whisk together the coconut aminos, honey, rice vinegar, grated ginger, minced garlic, and arrowroot powder to create the sweet and sour sauce.
Season the diced chicken breast evenly with the 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 cook until golden brown and cooked through, approximately 5 to 7 minutes.
Remove the cooked chicken from the pan and set it aside on a plate.
In the same skillet, add the sliced bell peppers and pineapple chunks, sautéing for 3 to 4 minutes until the peppers are tender-crisp.
Return the chicken to the skillet and pour the prepared sauce over the chicken and vegetable mixture.
Stir constantly for 1 to 2 minutes until the sauce thickens into a glossy glaze and coats all ingredients evenly.
Serve the hot stir-fry immediately over the warm cooked brown rice.