Buy and grind steak as near to serving time as possible; meat becomes dark in color if left standing.
Add only pepper to meat.
Shape meat into 4 equal-size cakes; make depression in center of each with spoon.
Place onion ring around depression; put egg yolk into center of each.
Sprinkle few capers on top of egg yolk.
Lay 1 curled anchovy fillet on top of each yolk or present garnishes on side.
Decorate with few chives or fresh horseradish