Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Toss the broccoli florets and sliced red bell peppers with half of the olive oil, sea salt, and black pepper on the prepared baking sheet.
Roast the vegetables for 15-18 minutes until they are tender and the edges are slightly charred.
While the vegetables roast, cut the chicken breast into bite-sized pieces and toss them in a bowl with the arrowroot powder until lightly coated.
Heat the remaining olive oil in a large skillet over medium-high heat. Add the chicken and sear for 5-7 minutes until golden brown and cooked through.
In a small bowl, whisk together the coconut aminos, sesame oil, minced garlic, and grated ginger.
Pour the sauce mixture into the skillet with the chicken, stirring constantly for 1-2 minutes until the glaze thickens and evenly coats the meat.
Plate the crispy teriyaki chicken alongside the roasted vegetables and garnish with sesame seeds before serving.