was not the invention of the Elves, but it was made and used by them throughout The Lord of the Rings well into the Third Age. The baking of lembas was an art of the Valar passed down to the Elves ...
This reinforces the concept that Elves may appear immortal ... The latter notably happens to the Elf-lord Glorfindel, who honorably dies in battle with a balrog in the First Age and is sent ...