The best bread is made from only four ingredients: flour, salt, water and fire. Sounds like a creation myth? Or maybe a magic system? Water and fire are just that. Flour is earth. Salt is a little tricky, but you could say it is fallen star fragments or something like that.
(I don’t know if there’s any culture that has that exact thing, but I know some have something similar. So check before you go any further, I guess.)
