What's the oldest food you've ever eaten?

[rentprop1]

tonight I dug out some almost 2 year expired mashed potatoes , I have to say that taste dropped to about a 7.5 or 8 out of 10, but I mixed some shredded cheese in there and enjoyed.
.

[Daca102090]

Mid 1960's ate a number of late WWII K-rations and in 1979 was eating late Korea or early Vietnam C-Rations.
Loved the turkey loaf and the fruit cake.

[RedJohn]

I just had recently a 4-yr passed date powdered soup. Opened the bag, saw that the power was till dry, cooked it and ate it. Simple and tasty.