Tartar Sauce

50ml olive oil
One egg yolk
One table spoon vinegar
Two gherkins (diced/ brunoix)
One shallot (ultra fine dice)
Table spoon capers (chopped)

Whisk the egg yolk with vinegar, keep whisking and gradually drizel oil in. very slowly.
This is how you make mayo.

https://www.reddit.com/r/Cooking/comments/1sgppu/can_you_provide_me_with_a_good_tartar_sauce/

1 cup real Mayonnaise
1 cup finely chopped dill pickles
1 Tbsp dill (fresh or frozen), OR 1 Tbsp finely chopped fresh parsley
1 tsp lemon juice
1 tsp sugar
1/4 tsp freshly ground black pepper
2 Tbsp finely chopped onion is good too, but optional (I usually skip it)

https://natashaskitchen.com/tartar-sauce-recipe/