Place all of the ingredients for the Greek chicken in your Instant Pot. Chicken, onion, Greek Yogurt, garlic, lemon juice, Greek seasoning and olive oil.
Cook on high pressure for 12-15 minutes.
Either let it naturally release or release pressure right away. It doesn't matter.
Shred chicken for the gyro quesadillas.
heat up a skillet over medium heat.
Between two flour torillas, place chicken, cheese and other toppings if you desire. brush the outside of the tortilla with olive oil if desired.
Cook on the sklllet, flip over when the first side is done cooking and slightly crispy.
garnish with vegetables and dip in tzatziki sauce as needed.