You will need
    • Pork kidneys - 0.5 kg
    • 1 large onion
    • 2 medium pickled gherkin
    • Brine
    • Melted pork fat
    • Pepper
    • Bay leaf
    • 150 grams of sour cream
The main secret in the preparation of any of the kidneys is their pre-processing.
Each kidney should be cut in half and get rid of fat and sinew, rinse well. But that's not all. Next you need to either soak them in milk or cold salted water, or do with them as I used to do Chinese - to make the kidneys shallower cuts, horizontal and vertical, roll in baking soda and leave on for twenty minutes.
Then wash and rinse with vinegar. And rinse again.
You can now to prepare. There is a very simple ancient Russian recipe familiar to us products.
Cut kidneys in small pieces.

Put in a saucepan with water and bring to boil.

Drain the water, re-inject the buds with boiling water and cook for another 10-15 minutes.

Drain them in a colander and let them drain well.
While the kidneys are cooking a large onion cut into half rings, and cucumbers - cubes.
Onions put into a frying pan with melted pork fat and fry until,until it becomes transparent.
With a slotted spoon to remove the onions from the pan and in its place put the kidneys. Kidney sauté the portions until Golden brown on top and to defer to the onion.
Put the onions and buds in a saucepan, add the cucumbers, Bay leaf, a few peas black pepper.

Pour a little of the brine and simmer on low heat for ten minutes.
Add in a saucepan the cream and simmer for another ten minutes.