Bon Appetit suggests you mix them with red onion and parsley, which sounds pretty good. This time I cut diced some red pepper - it's healthy and adds colour. I also diced two pickles and added them right in as well, because pickles are delicious. And don't forget two diced hard-boiled eggs. The magazine suggest only using the yolks - I don't want to be wasteful so I use the whites too.
The dressing, however, is the best part: 1/4 cup mayo, 1/8 cup pickle juice (right from the jar! So salty and sour!), 1 Tbsp Dijon for flavour, 1/2 tsp sugar, pepper and lots of paprika - any mix of sweet, hot and smoked, I have all three. But beware - I was a little too liberal this time and the salad took on a pinkish hue. Don't bother adding more salt - the pickles are salty enough.
And there you have it, the perfect side dish for (veggie) burgers! Be warned - this stuff is addictive. You won't be able to stop making it.