Put all the ingredients for the patties into a bowl and mix together thoroughly. Divide the mixture into four then press firmly together into patties.
Put the oil into a large frying pan and heat until medium hot. Add the patties and fry for 3-4 minutes on each side until golden brown. Meanwhile fry the eggs in another large frying pan.
Put a tablespoon of sour cream on each plate. Place a patty on top, cover with a fried egg and serve with a salad on the side.