Squeeze out the excess liquid from the grated potatoes with your hand and then mix in the spices and the seasoning. In a non-stick frying pan heat a little olive oil and when it is very hot divide the potatoes into four and put into the hot oil, pressing them down to make little pancakes.
Turn down the heat, cover with a lid and cook for about 5 minutes. Turn the pancakes over, raise the heat and cook until golden. Drain well and put a couple of slices of smoked salmon on each, fold over and serve with a spoonful of sour cream.