Steps
1. In a bowl, combine olive oil, lemon juice, minced garlic, rosemary, thyme, salt, and pepper to create the marinade.
2. Add the chicken breast to the marinade, ensuring it's fully coated. Cover and refrigerate for at least 30 minutes.
3. Preheat the grill to medium-high heat.
4. Toss the mixed vegetables with olive oil, balsamic vinegar, salt, and pepper, and place them on a baking sheet.
5. Roast the vegetables in a preheated oven at 425°F (220°C) for about 20 minutes.
6. Grill the marinated chicken for about 6-7 minutes per side or until cooked through and juices run clear.
7. Serve the grilled chicken hot alongside the roasted vegetables.