DERUNY Classic Ukrainian Recipe. Easy Potato Pancakes

Hi guys!
Today I will cook potato pancakes.This is a very simple and popular recipe in Ukraine, I am sure that you can easily do it. The recipe is possible with some changes, since the recipe is mine. But if you're wondering what happens, stay with me.

RECIPE:
5 potatoes
1 egg
1 onion
1 tbsp. With a hill of flour
Salt, pepper on your taste
100 ml oil for frying
Sour cream for serving