Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Dice the chicken breast, sweet potato, purple onion, and bell peppers into uniform 1-inch cubes to ensure even cooking.
In a small mixing bowl, whisk together the honey, tamari, olive oil, and minced garlic until well combined.
Place the chicken and chopped vegetables onto the prepared sheet pan, then drizzle the honey-garlic glaze over the top.
Season with sea salt and black pepper, then toss everything thoroughly with your hands or tongs to coat each piece.
Spread the mixture into a single layer, ensuring the pieces aren't too crowded so they roast instead of steam.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the sweet potatoes are fork-tender.