Back when we ate cooked foods (especially way back when our menu was not exclusively vegan), parmesan cheese seemed to be a staple of our existence (especially for Jim). We'd sprinkle it liberally on pasta dishes, salads, soups, and more.
As is typical for many raw foodies, you often realize after going raw that it was not always necessarily the food itself that you craved (no matter what it was); often it was simply the texture, the spices, the various flavors and tastes, etc. And that realization leads raw chefs to wonder whether the same experience can be recreated using only raw ingredients.
Read more: Quick Raw Tip: Making Your Own Raw Vegan Parmesan Cheese!