Cook the brown rice according to package instructions and set aside.
In a small bowl, whisk together the coconut aminos, rice vinegar, honey, grated ginger, and arrowroot powder to create the sweet and sour sauce.
Season the diced chicken breast with sea salt and black pepper.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and cook until golden brown and cooked through, approximately 5-7 minutes.
Remove the cooked chicken from the skillet and set it aside on a plate.
In the same skillet, add the minced garlic, chopped bell peppers, snap peas, and pineapple chunks.
Stir-fry the vegetables and fruit for 3-4 minutes until they are crisp-tender and slightly caramelized.
Return the chicken to the skillet and pour the prepared sauce over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens into a glossy glaze that coats the chicken and vegetables.
Serve the hot stir-fry immediately over the bed of cooked brown rice.