The ancient Egyptians left writing everywhere, with hieroglyphics carved painstakingly onto stone steles and miraculously preserved in papyrus. Though historians are able to study ancient texts on subjects from trade to funeral rites, one category is largely missing from the record: recipes. Without any textual directions or menus, historians have looked elsewhere to unlock the secrets of a 5,000-year-old culinary culture. As it turns out, paintings on tomb walls can provide a rare glimpse into one of the oldest cuisines in the world. Around 3100 BC, ancient Egyptians started to…