Color play.
It wouldn’t have to be every food, but just to pick some examples relevant in my household: what if onions were modified (just the least little bit) so any dish that included them would have a soft orange glow? Or if all meat (any food with a face) flashed every couple seconds like a fire-fly? Or red peppers emitted a soft growly noise?
Food allergy reactions would be a thing of the past. You’d hear the peanuts chirp, the murmur of the gluten, the chartreuse glitter of milk products.
Brave new world that has such foods! Be not afraid.