Preparation
Step: 1/10
Place the egg yolk and mustard in a bowl.

Step: 2/10
Stir well with a whisk.

Step: 3/10
Add the oil slowly, whisking constantly, until it forms a smooth mayonnaise.

Step: 4/10
Pat the capers and anchovies dry and finely chop.
Step: 5/10
Wash the herbs, shake dry and finely chop.

Step: 6/10
Peel and finely chop the shallot. Finely dice the cucumber.

Step: 7/10
Add everything to the mayonnaise.

Step: 8/10
Stir.

Step: 9/10
Squeeze the juice of the lemon.
Step: 10/10
Season the sauce with lemon juice, salt and pepper.