Not for eating! If bread is your thing, or you’re just looking for an unusual light or lamp, consider bread. Real bread, which is coated in resin to preserve it, then illuminated in various ways.
You can read more, and see more at Spoon & Tamago, or visit the Real Bread Lamp Shop.
This is ringing a bell, but feck if I know why… which suggests I’ve seen this (or something similar) in the past, but have no other recollections… Apologies for this content-lite / -free comment!
These first showed at Tokyo Design in 2014, so it’s very possible you came across them at some point or another. Or maybe there’s more illuminated bread out there!