Grating the celeriac and the carrots is easiest in a foodprocessor but can ofcourse also be done by hand. The qty you'll be left with is enormous so make sure you have a large bowl for mixing it.

Once the celeriac and the carrots are grated put them in the bigger bowl. Add the chopped onions, the raisins and the pumpkin seeds. Chop the nuts and add as well. Make a dressing of the olive oil, the vinegar, mustard, mayonaise and the lime juice. Add salt and pepper to taste.

Ad to the salad and mix well. Taste again and ad some mayonaise, limejuice and olive oil if needed.