Overall I'm quite happy with the system.
However I'd love to be able to figure out what major ingredients went together to form a specific type of cooking, kind of like the library part of herbalism and alchemy.
Also it'd be great if the food had a slight mechanical advantage over regular food. In the form of temporary health points or added saves and such.
Currently most food has no advantage over sporebread or Lower Grub (boiled shoe?) and though I thoroughly enjoy explaining the difficulty of my dishes compared to sporebread, there's no incentive for buying it other than pure RP-munchies.
I would suggest that using crafted meals gives a long duration small skill bonus (Cake gives bluff). Or it can simply be consumed as part of the resting process without bonus.