To make steak tartare, first peel and finely chop the shallot. Chop the capers, pickle, and parsley too.
Remove all membranes, sinew, and fatty parts from the beef. Cut it into cubes about 3–5 mm (⅛–3⁄16 inch) across. First, cut the beef into thin slices, as even in thickness as possible. Stack the slices, then cut them into thin strips. Finally, cut across the strips to make small cubes.
In a bowl, mix the Dijon mustard and egg yolks.
Add the oil and mix until uniform. You don’t need to make a mayonnaise-like emulsion; it’s enough for the oil to be evenly mixed with the egg yolks and mustard.
Season with the Worcestershire sauce and Tabasco.
Add the chopped shallot, capers, pickle, and parsley.
Finally, add the cubed beef, season with salt and pepper, and fold together gently. You don’t need to beat the mixture: work with it only until the seasoning mixture coats each cube of beef evenly.
Serve immediately. Shape it into a compact, round mound, preferably with a ring mold, but don’t press it down too much. Serve with fries, a fresh salad, and, if you like, toast.