Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized pieces and chop the bell pepper into 1-inch squares.
In a large bowl, toss the broccoli florets, bell pepper, and snap peas with half of the sesame oil, sea salt, and black pepper.
Spread the vegetables in a single layer on the prepared baking sheet and roast for 15-20 minutes until tender and slightly charred.
While the vegetables roast, heat the remaining sesame oil in a skillet over medium-high heat and sear the chicken until golden and cooked through.
In a small jar, whisk together the tamari, honey, finely minced ginger, and minced garlic to create the teriyaki glaze.
Pour the glaze into the skillet with the chicken, simmering for 2-3 minutes until the sauce thickens and becomes glossy.
Remove the roasted vegetables from the oven and toss them into the skillet with the chicken and glaze.
Serve the mixture over the warm cooked brown rice and garnish with sesame seeds and sliced green onions.