In a small bowl, whisk together the coconut aminos, rice vinegar, honey, grated ginger, minced garlic, and arrowroot powder until smooth.
Cut the chicken breast into bite-sized cubes and season evenly with sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Add the chopped red bell pepper, snap peas, and pineapple chunks to the pan with the chicken.
Sauté the mixture for 3-4 minutes until the vegetables are crisp-tender and the pineapple is slightly caramelized.
Pour the prepared sauce over the chicken and vegetables, tossing constantly for 1 minute until the sauce thickens into a glossy glaze.
Remove from heat and serve the stir-fry immediately over the warm cooked brown rice.