01 - Preheat oven to 400°F. Line a large rimmed baking sheet with parchment paper or aluminum foil for easy cleanup.
02 - Arrange chicken breasts on one side of the prepared baking sheet. Drizzle with 1 tablespoon olive oil and season generously with salt and black pepper.
03 - In a small mixing bowl, whisk together honey, cranberries, balsamic vinegar, Dijon mustard, minced garlic, and thyme until well combined.
04 - Arrange potatoes, Brussels sprouts, red onion wedges, and carrots on the remaining side of the baking sheet. Drizzle 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 it evenly to cover the surface. Reserve the remaining glaze for later use.
06 - Bake for 20 minutes until the chicken begins to cook through and vegetables start to soften.
07 - Remove the baking sheet from the oven. Brush or spoon the reserved glaze over the chicken. Toss vegetables gently for even browning. Return to oven and bake for an additional 15 minutes until chicken reaches internal temperature of 165°F and vegetables are tender and golden.
08 - Transfer chicken and vegetables to a serving platter. Serve hot, garnished with additional fresh thyme if desired.