Food healing during a short or long rest I could understand (maybe making 'eating food' the mechanic behind expending a hit-die to heal), but having food do an instant heal and setting no limit on how many times it can be used completely devalues healing potions, spells etc and flies in the face of normal D&D rules.
Healing up isn't supposed to be easy, you aren't supposed to be able to start every fight at full HP, fully rested and with all spells prepared.

Last edited by praxidicae; 13/10/20 10:23 AM. Reason: changing 'hit-dice' to 'hit-die'