Add finely chopped onion, salt and pepper to the minced meat. Knead the minced meat well. You can add your favorite ingredients to the minced meat. I wrote that I added; -). Cover the food wrap and put the minced meat on it, and spread the cooked egg and onion mixture on top of the minced meat. With the help of a film, we roll all this into a roll and send it to the freezer for several hours.