In a small bowl, whisk together the tamari, honey, sesame oil, minced garlic, and grated ginger to create the teriyaki glaze.
Season the diced chicken breast evenly with the sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and cook for 5-6 minutes, stirring occasionally, until golden brown and cooked through.
Toss in the broccoli florets along with a tablespoon of water; cover the pan for 2 minutes to lightly steam the broccoli until vibrant green.
Remove the lid, pour the teriyaki sauce over the chicken and broccoli, and toss for 1 minute until the sauce thickens and coats everything.
Serve the stir-fry immediately over the warm cooked white rice and garnish with sesame seeds.