Marinate the Chicken: In a large ceramic or glass bowl, whisk together the olive oil, vinegar, lemon juice, spices, salt, and pepper. Add the chicken and toss to coat evenly. Cover and refrigerate for at least 30 minutes or overnight.
Cook the Chicken: Remove the chicken from the fridge and let it sit at room temperature for 20 minutes. Heat 2 tablespoons of olive oil in a large non-stick skillet over medium heat. Remove the chicken from the marinade, letting any excess drip off, and discard the remaining marinade. Place the chicken in the skillet and cook undisturbed for 3–5 minutes until golden brown. Flip and cook for another 3–4 minutes, or until fully cooked. Transfer to a plate and set aside.
Make the Sauce: In the same skillet, add a little more oil if needed, then sauté the onion over medium heat until softened, about 5 minutes. Add the garlic and red pepper flakes, cooking for 1 minute until fragrant.
Simmer and Serve: Stir in the tomatoes and broth, simmer for 5 minutes. Add olives, feta, parsley, dill, and mint. Return the chicken to the skillet and cook for 1 minute to meld flavours. Serve warm and enjoy!
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