Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Chop the broccoli, bell pepper, and carrots into bite-sized pieces and toss them on the baking sheet with half of the avocado oil, sea salt, and black pepper.
Roast the vegetables for 18-20 minutes until the edges are slightly charred and tender.
While the vegetables roast, whisk together the coconut aminos, minced ginger, minced garlic, and arrowroot powder in a small bowl to create the teriyaki glaze.
Cut the chicken breast into 1-inch cubes and season lightly with a pinch of salt.
Heat the remaining avocado oil in a large skillet over medium-high heat. Add the chicken and sear for 5-6 minutes, turning occasionally, until golden brown and cooked through.
Reduce the heat to low and pour the teriyaki glaze into the skillet with the chicken. Stir constantly for about 1 minute until the sauce thickens into a glossy coating.
Remove the roasted vegetables from the oven and divide them onto plates. Top with the glazed chicken and garnish with sesame seeds.