Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper.
In a small bowl, whisk together the honey, tamari, minced garlic, and 0.25 tbsp of olive oil to create the glaze.
Place the cubed sweet potatoes on the pan, drizzle with the remaining 0.25 tbsp of olive oil, and toss to coat.
Roast the sweet potatoes for 10 minutes to give them a head start on cooking.
Remove the pan and add the chicken breast pieces, broccoli florets, green beans, and sliced red onion.
Pour the honey-garlic glaze over the chicken and vegetables, tossing well to ensure every piece is thoroughly coated.
Return the pan to the oven and roast for 15 to 18 minutes, or until the chicken is cooked through and the vegetables are tender-crisp.
Season with the sea salt and black pepper before serving hot from the pan.