In a bowl, whisk together olive oil, lemon juice, minced garlic, oregano, thyme, salt, and pepper to create the marinade.
Place the chicken breasts in a resealable bag or shallow dish. Pour the marinade over the chicken, ensuring it is evenly coated. Marinate for at least 30 minutes, or up to 4 hours in the refrigerator.
Preheat your grill or oven to 400°F (200°C).
If grilling, grill the chicken for 6-8 minutes per side, or until cooked through and no longer pink in the center. If baking, place the chicken on a baking sheet and bake for 20-25 minutes, or until cooked through.
Let the chicken rest for 5 minutes before slicing.
Serve the chicken topped with halved cherry tomatoes, olives, crumbled feta cheese, and chopped parsley, if desired.
Notes
This chicken is delicious served with a side salad, rice, or quinoa.