Prepare the brown rice according to package directions or use pre-cooked rice warmed through.
Mince the garlic clove and finely grate the fresh ginger.
In a small mixing bowl, whisk together the tamari, honey, minced garlic, and grated ginger to create the teriyaki sauce.
Dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sauté for 5-6 minutes until golden brown and fully cooked.
Add the broccoli florets to the pan with two tablespoons of water, then cover with a lid to steam for 2-3 minutes until tender-crisp.
Remove the lid and pour the prepared sauce over the chicken and broccoli.
Toss everything together for 1 minute until the sauce thickens and coats the ingredients evenly.
Serve the stir-fry immediately over the warm brown rice and garnish with sesame seeds.