Step 1

Lightly coat air-fryer basket with cooking spray.

Step 2

Combine turkey, oil, oregano, red pepper, salt and garlic in a bowl. Mix well. Form the mixture into 2 (1/2-inch-thick) patties. Place in the prepared air-fryer basket and cook at 360 degrees F until a thermometer registers 155 degrees F, 13 to 15 minutes, turning once during cooking.

Step 3

Toss spinach, onion and vinegar together. Divide feta among top and bottom halves of buns. Place the burgers on the bottom halves of the buns. Top with the spinach mixture and the bun tops.