Capers, Shallots, Crostini
Finely chop the prime beef tenderloin and place it in a mixing bowl.
Add the capers, chopped shallots, Dijon mustard, Worcestershire sauce, salt, and black pepper to the bowl with the beef. Mix well to combine.
Create a small well in the center of the mixture and carefully place the egg yolk in the well. Gently fold the egg yolk into the mixture until fully combined.
Sprinkle the chopped parsley over the top and mix gently.
Serve the steak tartare immediately on chilled plates accompanied by crostini on the side.