Creating One Pan Balsamic Chicken is straightforward if you follow these steps:

1. Prepare Marinade: In a bowl, whisk together balsamic vinegar, honey, minced garlic, dried oregano, salt, and black pepper until combined.
2. Marinate Chicken: Place the chicken breasts in a large zip-top bag or a shallow dish and pour the balsamic marinade over them. Let marinate in the refrigerator for at least 30 minutes (up to 2 hours).
3. Preheat Oven: Preheat your oven to 400°F (200°C).
4. Prepare Vegetables: While the chicken marinates, wash and chop your mixed vegetables into bite-sized pieces.
5. Sauté Vegetables: In a large oven-safe pan, heat olive oil over medium heat. Add mixed vegetables and sauté for about 3-5 minutes until slightly tender. Remove from pan and set aside.
6. Cook Chicken: In the same pan, place the marinated chicken breasts and sear each side for about 3-4 minutes until golden brown.
7. Add Back Vegetables: Return the sautéed vegetables to the pan, arranging them around the chicken.
8. Bake: Pour any remaining marinade over the chicken and vegetables. Transfer the pan to the preheated oven and bake for 20-25 minutes, or until the chicken is cooked through (internal temperature of 165°F or 74°C).
9. Rest and Serve: Remove from the oven and let the chicken rest for 5 minutes before slicing. Drizzle with additional balsamic vinegar if desired.