Cook brown rice according to package instructions or use pre-cooked rice.
In a small bowl, whisk together tamari, honey, grated ginger, minced garlic, arrowroot powder, and water to create the teriyaki sauce.
Slice chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat sesame oil in a large skillet or wok over medium-high heat.
Add chicken to the skillet and sear until golden brown and cooked through, about 5-7 minutes.
Remove chicken from the pan and set aside.
Add broccoli, bell peppers, and snap peas to the same skillet, sautéing for 3-4 minutes until vibrant and tender-crisp.
Return the chicken to the pan and pour the teriyaki sauce over the mixture.
Toss everything together for 1-2 minutes until the sauce thickens and coats the ingredients beautifully.
Serve the stir-fry over the warm brown rice and garnish with sesame seeds.