Steps

Using a very sharp knife cut the beef into a fine dice.
Combine the beef, cornichons, shallots, Dijon and soy in a bowl; adjust the seasoning of Dijon and soy to taste. Keep cold in the fridge.
Combine the beef, cornichons, shallots, Dijon and soy in a bowl; adjust the seasoning of Dijon and soy to taste. Keep cold in the fridge.
Place a ring mould onto the serving plate, spoon the mixture into the mould, make a small indent in the top and pour in the egg yolk.
Remove the ring mould, place a teaspoon of salt flakes and a teaspoon of Dijon to the side of the plate with the toasted brioche and serve immediately.

MasterChef