01 - Preheat oven to 400°F. Line a large rimmed baking sheet with parchment paper or foil for easy cleanup.
02 - Place chicken breasts on one side of the baking sheet. Drizzle with 1 tablespoon olive oil and season generously with salt and black pepper on both sides.
03 - In a small bowl, whisk together honey, cranberries, balsamic vinegar, Dijon mustard, minced garlic, and thyme until well combined.
04 - Arrange potatoes, Brussels sprouts, red onion, and carrots on the other side of the baking sheet. Drizzle vegetables with 1 tablespoon olive oil, season with salt and pepper, and toss to coat evenly.
05 - Spoon half of the honey cranberry glaze over the chicken breasts, spreading evenly to coat the top surface. Reserve remaining glaze for later.
06 - Bake for 20 minutes. Remove from oven and gently brush or spoon the remaining glaze over the chicken. Toss vegetables for even browning.
07 - Return to oven and bake an additional 15 minutes, or until chicken reaches internal temperature of 165°F and vegetables are tender and golden brown.
08 - Serve chicken and vegetables hot, garnished with additional fresh thyme if desired.