Pat the chicken breast dry and cut into bite-sized cubes, then season with sea salt and black pepper.
In a small bowl, whisk together the gochujang, tamari, honey, and minced ginger to create the spicy glaze.
Heat the sesame 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, about 5-6 minutes.
Remove the chicken from the pan and set aside, then add the broccoli, bell pepper, snap peas, and minced garlic to the same pan.
Stir-fry the vegetables for 3-4 minutes until they are bright and crisp-tender.
Return the chicken to the pan and pour the gochujang sauce over the mixture, tossing constantly for 1 minute until the sauce thickens and coats everything evenly.
Serve the stir-fry immediately over the warm cooked brown rice.
Garnish with sliced green onions and toasted sesame seeds for a final touch of texture.