In a bowl, whisk together 5 tablespoons olive oil, the vinegar, parsley, garlic, and salt and pepper to taste. Pour over chicken and allow to marinate 10 minutes or so.
Heat 2 tablespoons olive oil in a large skillet heated over medium heat. Brown chicken on all sides, reduce heat to low and add marinade from step 1. Cover pan and cook until juices run clear, about 15 - 20 minutes, turning at least once. Remove cover and cook until sauce is desired consistency.
Squeeze the juice of one lemon over top, stir gently, and serve.