You’ll start by putting the onions in the food processor until they are chopped finely. Remove the onions and dry them. Put them in a large bowl and set them aside.
Put the parsley in the food processor until it is minced well. Once that is finished, remove it from the processor and stir it with the onions.
Place the beef, egg, and salt into the onion and parsley mix. Mix these together lightly, but well-done.
Take your pita bread and slice it horizontally in halves. Place them out and add your mixture to the bottom slice. Add the top slice to the sandwich and press on it gently to keep it together.
The outside of the sandwich will now be brushed with oil and grilled uncovered on medium heat for about 11 minutes, turning the sandwich every 2 minutes. The meat inside the sandwich should be around 160 degrees when you are done.
Take the sandwich off the grill and let it cool a bit. Cut the sandwich into quarters and sit some sauce on the side.