Take flour made from wild wheat and barley, mix with the pulverised roots of floras, add ocean, then bake.
According to scientists, this is the recipe for the world’s oldest dough, 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 utilized the bread as a fold for cooked meat. Thus, as well as being the oldest food, 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.