Take the tofu out of the package, rinse with water and extract as much liquid out of the tofu as possible by using a tofu press or some plates. If using plates, set the tofu on one plate and then place several more plates on top and let it set for about 20 minutes.
When as much liquid has been extracted from the tofu as possible, place the tofu into a large bowl and mash with a fork until there are no big pieces and it’s nice and crumbly.
Add the celery, onion and parsley and stir.
Add the mayo, nutritional yeast and turmeric powder and stir again, until all of the ingredients are combined.