Add your chopped steak to a bowl with the anchovy, mustard, olive oil, capers and eschallot. Add salt and pepper. Mix until well combined.
Divide meat equally between 4 plates, arranging the meat in a patty shape in the centre of the plates. Adding and shaping a little at a time makes it easier to get a nice shape.
Arrange pickle, herbs, lemon, salt and pepper around the Keto Steak Tartare.
Top each Steak Tartare with an egg yolk and serve.