Finely chop the onion.
Chop the spinach.
In a bowl, combine ground turkey, onion and spinach.
Add mayonnaise and egg. Salt and pepper. Mix the mince well.
Form 3-4 cutlets from the minced meat. Heat the frying pan well, pour in vegetable oil and place the cutlets on it.
Fry the cutlets over medium heat for 5 minutes on each side. If the cutlets are still not ready, fry them for another 2 minutes on each side.
Sprinkle the finished cutlets with chopped spinach. Enjoy your meal.