Cook potatoes, peel and blend. Add the feta cheese, cheese, savory, parsley, salt, pepper and 2 eggs. All of this mixture was passaged and stirred well. Are formed meatballs and rolled in bread crumbs, then dipped in beaten egg and again rolled in bread crumbs. Fry until golden in the fryer or pan with more oil. Separately prepare the sauce, adding to yogurt add finely chopped dill and parsley and chopped garlic. The mixture is stirred well and meatballs are served with this sauce.