Step 1: Marinate the Chicken

1. In a large bowl, whisk together olive oil, lemon juice, minced garlic, oregano, thyme, smoked paprika, red pepper flakes, salt, and black pepper.
2. Add the chicken breasts to the bowl and toss to coat evenly. Cover and refrigerate for at least 30 minutes, or up to 4 hours for maximum flavor.

Step 2: Prepare the Vegetables

1. While the chicken marinates, preheat your oven to 400°F (200°C).
2. Arrange the cherry tomatoes, red onion, zucchini, bell pepper, Kalamata olives, and sun-dried tomatoes on a large baking sheet or in an oven-safe dish. Drizzle with a little olive oil, season with salt and pepper, and toss to coat.

Step 3: Sear the Chicken (Optional for extra flavor)

1. Heat a skillet over medium-high heat and add a drizzle of olive oil.
2. Remove the chicken from the marinade and sear for 2-3 minutes per side until golden brown. This step locks in flavor and creates a beautiful crust.

Step 4: Bake the Chicken and Vegetables

1. Nestle the chicken breasts among the vegetables on the baking sheet or dish. Pour any remaining marinade over the chicken and vegetables.
2. Bake for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F (75°C) and the vegetables are tender.

Step 5: Garnish and Serve

1. Remove the baking sheet from the oven and let the chicken rest for 5 minutes.
2. Garnish with fresh parsley and crumbled feta cheese, if desired. Serve with lemon wedges for an extra burst of flavor.