Preheat your oven to 425°F and adjust racks to the middle position.
Cut the potatoes into ½-inch wedges and the carrots into ½-inch-thick diagonal pieces.
Melt the half of the butter in a microwave-safe bowl for 20-30 seconds. Stir in a pinch of salt, pepper, and breadcrumbs until combined.
In a separate small microwave-safe bowl, melt the remaining half of the butter for 20-30 seconds. Add maple syrup, mustard, and a pinch of salt. Stir until smooth.
In a small bowl toss the potatoes and carrots with olive oil, salt, and pepper and arrange on the baking sheet.
Coat the chicken with the maple mustard sauce and coat with the breadcrumbs. Place on the baking sheet opposite the carrots and potatoes.
Roast for 25-30 minutes until the chicken is golden brown and cooked through, and the veggies are tender. If the chicken finishes before the veggies, remove it from the oven and continue roasting the veggies for an additional 3-5 minutes.