Slice the chicken breast into bite-sized cubes and season with sea salt and black pepper.
In a small bowl, whisk together the coconut aminos, rice vinegar, honey, minced ginger, and minced garlic to create the stir-fry sauce.
Heat the avocado oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5-7 minutes.
Toss in the sliced bell peppers, sugar snap peas, and pineapple chunks, sautéing for 3-4 minutes until the vegetables are tender-crisp.
Pour the prepared sauce over the chicken and vegetables, stirring constantly for 1-2 minutes until the sauce thickens and coats everything evenly.
Serve the stir-fry immediately over the warm, cooked brown rice.