For the spinach potato blinis, first press cooked and peeled potatoes through a press.
Season the potatoes and mix with yolk, milk and sour cream to a creamy dough.
Defrost Iglo spinach leaves, squeeze well and chop coarsely.
Mix the chopped spinach well into the dough.
Beat egg whites with a little salt until firm.
Fold beaten egg whites and flour into the blini batter.
Using a spoon, place small portions in a pan with hot oil.
Turn blinis often and bake for a total of about 8-10 minutes until golden brown.
Before serving, top spinach potato blinis with any ingredients.