In a large bowl, mix together the yogurt, olive oil, lemon juice, vinegar, garlic, salt, and spices. Add the chicken tenders and mix to make sure chicken is well coated with the marinade. Cover and refrigerate for 30 minutes (or refrigerate overnight, if you like)
Heat 1 tablespoon of extra virgin olive oil in a non-stick skillet over medium-high until shimmering but not smoking. Add chicken tenders to the pan (make sure to shake off any excess marinade before adding chicken to the pan.) Cook on one side undisturbed for 5 minutes until browned. Using a pair of tongs, turn chicken over and cook on other side for another 5 minutes or until chicken is done.
