And eating food lets you heal up to full making clerical magic replaceable by a potato!
I think that is probably fine. It's a better solution than short rest spam after every single encounter. It's not like you really want to waste your cleric spells outside of an encounter anyway. I think abuse of food healing could very easily be solved by a "Can't eat anymore, I'm full" after you've stuffed yourself. Make it so your character is "Full" untill your next long or short rest - that could encourage a clever use of both healing magic and food HP replenishment, as long as we have a "Fullness" gauge that is visible for your character.
