Take flour made from wild wheat and barley, mix with the pulverised beginnings of weeds, add ocean, then bake.
According to scientists, this is the recipe for the world’s oldest bread, dating back more than 14,000 years.
The bake would have looked like a flatbread and savoured a bit like today’s multi-grain bread, they say.
Our ancestors may have employed the bread as a cover for roasted flesh. Thus, as well as being the oldest eat, it may also have been the oldest sandwich.
“This is the earliest evidence we have for what we could really call a cuisine, in that it’s a mixed food product, ” Prof Dorian Fuller of University College London told BBC News.