Use yogurt that is not too watery. Put the yogurt in a mixing bowl.
Add 2-3 minced garlic cloves.
Add coarsely chopped walnuts.
Add salt to taste.
Grate the celery roots using the coarser side of the grater. Immediately add to the yogurt mixture, so that the celery does not darken.
Garnish with red pepper flakes and/or dry mint flakes.
As an alternative; cut thin slices of orange and put scoops of celery root salad on top of each slice.
Serve chilled.
Notes
When you peel and cut the celeriac like an apple if you notice that the center part is not stiff but rather chewy looking, take that part out and discard as it will not be very tasty.Walnuts should be coarsely chopped, you can use a food processor to chop but do not turn the walnuts into a powder.