So, I'm actually surprised that there hasn't been a thing about this before (at least not that I could find with the search function). But I think it'd be neat to have cooking in the game. I mean, I know you can make preset food at certain places, but I'd really love to be able to have a character who can make their own food.
There are a couple of ways this could be done, but I think the simplest might be along the lines of how making clothing works. You get some base item like 'poor grade ingredients' or 'fancy ingredients' and then make it into a meal, setting the description, taste, smell, whatever else all goes into food. You'd need a kitchen or fire or something to 'cook' the food on (even if it is cold food or whatever, gogo mechanics), much like you need the various tools for making cloths.
I don't think it would need to be attached to any skill (I mean, a cooking skill would be neat, but way too specific, and artistry already covers about 20 absurdly different areas), unless maybe it was a 'side skill' kind of like languages are.
Actually, I think more side skills like languages would be really cool, but that's for an entirely different post.