Place the chicken, onions and chopped pickles in a large bowl.
In another bowl whisk together the yogurt, mayo, relish, mustard, chives, dill and a big pinch of salt and pepper.
Add the mixture to the chicken and pickles and toss well.
Taste and season with more salt and pepper if needed.
Serve with toast, on sandwiches, with crackers, in lettuce cups, on salad and more.
