Tartar or tartare sauce is one of the all-time classic French sauces that dates to the mid-1800s, it is a mayonnaise-based sauce with capers, and cornichons, my version includes dill.
Add the egg yolk and Dijon mustard to a bowl and whisk until combined.
Add half a teaspoon of oil and whisk until completely emulsified, then add a teaspoon of oil and whisk again until your mix is completely emulsified.
Repeat this process until all of the oil is added and you have a thick mayo. As you get past the first 3-4 teaspoons, you can start adding more oil at a time.
Dice the cornichons and add them to the mayonnaise.
Roughly chop the capers and add them to the mayonnaise.
Finely chop the dill, add it to the mayo with the salt, then give it a stir.
Have a taste and add in the pickling juices from the cornichons; you should do this to taste. You can also swap this out for vinegar or even lemon juice.
Video
Notes
The calorific value for this recipe refers to the full amount.