Dice the chicken breast into bite-sized pieces and season them evenly with sea salt and black pepper.
In a small glass bowl, whisk together the tamari, rice vinegar, honey, and red pepper flakes until well combined.
Heat the extra virgin olive oil in a large skillet or wok over medium-high heat until shimmering.
Add the chicken to the skillet and cook for 5-7 minutes, stirring occasionally, until the pieces are golden brown and cooked through.
Remove the chicken from the pan and set aside on a plate; add the broccoli florets to the same pan with a tablespoon of water.
Cover the pan with a lid for 2 minutes to steam the broccoli until it is bright green and tender-crisp.
Remove the lid and add the minced garlic and grated ginger, sautéing for 60 seconds until the aromatics are fragrant.
Return the chicken to the skillet and pour the prepared sauce over the mixture, tossing everything for 1-2 minutes until the glaze thickens.
Transfer to a plate and garnish with sesame seeds before serving immediately.