Dice the chicken breast into bite-sized pieces and toss in a bowl with sea salt, black pepper, and arrowroot powder until evenly coated.
Preheat your air fryer to 400°F and cook the chicken for 10-12 minutes, shaking the basket halfway through, until the exterior is crispy and golden.
While the chicken is air-frying, whisk together the coconut aminos, rice vinegar, honey, and red pepper flakes in a small bowl to create the sauce base.
Heat the sesame oil in a large skillet over medium heat; add the minced garlic and freshly grated ginger, sautéing for 1 minute until highly fragrant.
Pour the sauce mixture into the skillet and bring to a gentle simmer for 2-3 minutes until the liquid reduces into a thick, glossy glaze.
Steam the broccoli florets in a steamer basket over boiling water for 4-5 minutes until they are tender but still vibrant green.
Add the crispy air-fried chicken to the skillet and toss vigorously to ensure every piece is thoroughly coated in the sweet and tangy glaze.
Serve the glazed chicken immediately over a bed of warm brown rice with the steamed broccoli on the side, garnished with thinly sliced green onions.