Cooking - Please translate ingredients into real life ones.
One of my favorite things recently was finding out the World of Warcraft cook book, and I thought it was a shame that there was no true 1:1 for ingredients. You couldn't truly understand what the food in their world could be in ours. I think the cookbook was a nice rough fix to get close to what they could do, but I want an even greater fidelity.
So I suggest, that for food like ingredients you map them to a real world ingredient that you could make your favorite in game recipe...perhaps holding contests for recipe contests that use the ingredients the best.