Liver (liver, lungs, heart – in any proportions) rinse, put in a saucepan, add water, bring to a boil. Cook until tender over low heat, covered.
Rinse the potatoes well, put them in a saucepan, add water, bring to a boil. Cook the potatoes “in their skins” until tender over low heat, covered (about 20-25 minutes).
Take out the ready liver, cool, mince.
Peel the onion, wash, chop finely.
Cool boiled potatoes a little, peel, mince. Add the egg, salt, and stir.
Preheat a frying pan, pour vegetable oil into it. Put the onion in hot oil and fry over medium heat, stirring occasionally, until golden brown.
Add meat. Fry everything together for 3-4 minutes, stirring occasionally. Pepper, salt. Mix well. Refrigerate. Minced meat for potato cutlets is ready.
Form potato zrazy with the liver.
Roll in flour.
Preheat a frying pan, pour in vegetable oil. Put the potato zrazy in hot oil. Fry potato zrazy with liver over medium heat for about 3-5 minutes on each side, until golden brown.