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.
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 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 across the surface. Reserve remaining glaze for later use.
06 - Bake for 20 minutes until chicken begins to cook through and vegetables start to soften.
07 - Remove from oven and brush or spoon the remaining glaze over the chicken. Toss vegetables if needed. Return to oven and bake an additional 15 minutes until chicken reaches internal temperature of 165°F and vegetables are tender and golden.
08 - Serve chicken and vegetables hot, garnished with additional fresh thyme if desired.