Slice the chicken breast into bite-sized pieces and season evenly with sea salt and black pepper.
In a small glass bowl, whisk together the tamari, honey, grated fresh ginger, and minced garlic to create the teriyaki glaze.
Heat the toasted sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken pieces to the skillet and sear for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Remove the chicken from the pan and set aside on a plate.
In the same skillet, add the broccoli florets, sliced red bell pepper, and sugar snap peas, stir-frying for 3-4 minutes until they are tender-crisp and vibrant.
Return the cooked chicken to the skillet and pour the teriyaki glaze over the chicken and vegetables.
Toss everything together for 1-2 minutes until the sauce has thickened and coated every piece evenly.
Serve the stir-fry immediately over a bed of warm cooked brown rice.