Preheat your oven to 425°F and line a large sheet pan with parchment paper for easy cleanup. Pat your chicken pieces completely dry with paper towels—this step ensures crispy skin and prevents steaming during cooking.
Whisk together honey, minced garlic, olive oil, soy sauce, balsamic vinegar, and Dijon mustard in a small bowl until well combined. This glaze becomes the flavor foundation for your entire sheet pan meal, so take 30 seconds to really blend it smooth.
Arrange chicken pieces skin-side up on your prepared sheet pan, leaving space around each piece for air circulation. Toss baby potatoes, Brussels sprouts, red bell pepper, and yellow onion together in a large mixing bowl, then season with thyme, paprika, black pepper, and salt.
Spread seasoned vegetables around the chicken pieces, then drizzle the loaded sheet pan honey garlic chicken with your prepared glaze, coating everything generously. Roast for 35 minutes, stirring vegetables halfway through cooking to ensure even caramelization and prevent sticking on the pan.
The chicken is finished when it reaches 165°F internally and skin appears golden brown and crispy. Let it rest for 5 minutes before serving, garnishing with fresh parsley and enjoying the incredible aroma filling your kitchen.