Greek Chicken Salad with Tangy Greek Dressing

For the Chicken:

boneless skinless chicken breast, thinly sliced

garlic, finely minced

large lemon, juiced

red wine vinegar

heaping tablespoons plain Greek yogurt

olive oil (plus an additional tablespoon for cooking)

dried oregano

kosher salt

coarsely ground black pepper

For the Dressing:

red wine vinegar

garlic, very finely minced

lemon juice

spicy mustard

onion powder

dried oregano

extra virgin olive oil

For the Salad:

mixed greens

red onion, thinly sliced

sliced black olives

sliced banana peppers

crumbled feta cheese