Pat the chicken breast dry and cut into bite-sized 1-inch cubes, then season evenly with the sea salt and black pepper.
In a small glass bowl, whisk together the coconut aminos, raw honey, toasted sesame oil, minced garlic, and grated fresh ginger until well combined.
Heat the avocado oil in a large cast-iron skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet in a single layer and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Toss in the broccoli florets and add 2 tablespoons of water; cover the pan for 2 minutes to lightly steam the broccoli until it is bright green and tender-crisp.
Remove the lid, pour the prepared teriyaki sauce over the chicken and broccoli, and stir constantly for 1-2 minutes until the sauce thickens and coats everything beautifully.
Transfer to a plate and garnish with sesame seeds before serving warm.