Preheat your oven to 425°F (220°C). Line a large baking sheet with parchment paper for easy cleanup.
In a small bowl, whisk together honey, Dijon mustard, olive oil, garlic powder, onion powder, smoked paprika, salt, and pepper until well combined.
Place the chicken thighs on one side of the prepared baking sheet. Brush the honey mustard mixture generously over the chicken, reserving a small amount for later.
In a separate bowl, toss the halved baby potatoes with olive oil, salt, and pepper. Arrange the potatoes on the other side of the baking sheet.
Bake in the preheated oven for 25 minutes.
After 25 minutes, add the corn to the baking sheet and drizzle the reserved honey mustard mixture over the corn.
Return the baking sheet to the oven and bake for an additional 15-20 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are tender.
Remove from the oven and let rest for 5 minutes. Garnish with fresh parsley before serving.