Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast and russet potato into bite-sized 1-inch cubes, slice the mini peppers into rings, and thinly slice the red onion.
In a small mixing bowl, whisk together the honey, tamari, minced garlic, and olive oil until well combined.
Place the chicken, potatoes, peppers, onions, and corn kernels onto the prepared sheet pan.
Pour the honey-garlic glaze over the ingredients and toss thoroughly to ensure everything is evenly coated.
Spread the mixture out into a single layer and season evenly with sea salt and black pepper.
Roast in the oven for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the potatoes are golden and tender.