For a unique and delicious burger, try this Greek lamb air fryer hamburger recipe. Mix ground lamb with minced garlic, dried oregano, salt, and pepper. Form the mixture into patties and cook them in the air fryer until they are cooked through. Top each patty with crumbled feta cheese, sliced cucumbers, tomatoes, red onions, and a drizzle of tzatziki sauce. Serve on a toasted bun for a Greek-inspired burger that is full of flavor.