Finely dice the boiled egg and cornichon pickles. Remove core and finely dice half an apple. In a medium-sized bowl, whisk together mayo, yogurt, pickle juice, lemon juice and honey. Add the diced egg, pickle and apple and season to taste with salt and pepper. Finely chop the parsley and stir in.
1 egg, 4 cornichon pickles, ½ apple, 2 tablespoons mayo, 100 grams Greek yogurt, 1 tablespoon pickle juice, 1 teaspoon fresh lemon juice, 1 handful chopped, fresh parsley, 1 teaspoon honey