Add finely chopped onion, grated potato, egg yolks, and I added some chopped dill to the minced meat. Season with salt and pepper to taste, mix well until smooth. Now the minced meat needs to be beaten. To do this, gather the mince with your hands, lift it and forcefully throw it back into the bowl (or on the table). This should be done 10-15 times. The minced meat will become more viscous, smooth, and soft to the touch. Cover the minced meat with a lid or plastic wrap and refrigerate for 30-40 min to make the minced meat firmer and easier to shape into patties.