IMO Food should be shifted to a "diet" system.
The benefits of food being effectively permanent until replaced, with Five Star Diner allowing the character to hold two at a time.
The game would generally benefit from having certain effects and cooldowns tick down on a "combat encounter" basis.
Until replaced means, you find one good food and stick with it for ever. Or you need better and better food.
I would say, food stays active until end of the next combat. That way you need continuous supply of food. (Maby you meant the same.)
Five Star Dinner could have 2 bonuses and/or effect lasts 2 fights.
