A small change about wellness mechanic that will give complex food and drinks actual use.
Divide wellness into tiers. For example you can get +20 max hp using any food. Getting from +21 to +40 max hp you need to eat/drink something else than just simple stuff. Going forward it gets more and more complex, until the last +81 to +100 max hp requires the hardest stuff to make.
Also due to that change, reduce the amount of wellness gained from food. I think the complex food has high values to encourage players to use it for wellness increase. With new system above, you have a different mechanic that encourages you to use complex stuff.
Of course thresholds can be different, like every 25 max hp or every 33.