In a small bowl, whisk together the coconut aminos, honey, rice vinegar, arrowroot powder, and water until smooth.
Season the cubed chicken breast with a pinch of sea salt and black pepper.
Heat the sesame oil in a large skillet over medium-high heat until shimmering.
Add the chicken to the skillet and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Stir in the minced garlic, grated ginger, and red pepper flakes, cooking for 1 minute until highly fragrant.
Pour the prepared sauce mixture into the skillet and stir constantly for 1-2 minutes until the glaze thickens and coats the chicken.
Steam the broccoli florets in a separate pot or steamer basket until tender-crisp and bright green.
Plate the chicken over the warm cooked brown rice and serve alongside the steamed broccoli.