It’s way better than what you can buy in shops, and you can make tons to eat with every single bite of fish.
- mayo (I assume yogurt is ok too for healthy ppl but I am lactose intolerant)
- finely diced raw onion, can be white or red or shallots
- chopped capers (not traditional but they add to the overall sourness/vinegar-ness)
- lots of chopped fresh dill and/or parsley
- fresh lemon juice
- finely diced pickles
- salt and pepper
Some people put boiled eggs in tartar sauce but I think that is too much effort for what should be a quick dip.
Measure with your heart and enjoy!