Take flour made from wild wheat and barley, mix with the pulverised beginnings of floras, add water, then bake.
According to scientists, this is the recipe for the world’s oldest food, dating back more than 14,000 years.
The bake would have looked like a flatbread and tasted a bit like today’s multi-grain eat, they say.
Our ancestors may have expended the bread as a fold for roasted meat. 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.