Roughly chop the hard-boiled eggs. If you like, use an egg slicer and cut each egg in two directions: slice it once, then turn the sliced egg a quarter turn and slice it again crosswise.
Stir the crème fraîche and mayonnaise together, add the curry powder, turmeric, chives and chopped eggs, and season to taste with salt and pepper.
Top the egg salad with finely chopped chives, spring onions or cress.*Keep the egg salad covered in the fridge until you are ready to serve it.