To make the buckwheat flatbread; pre-heat a griddle pan (or frying pan) so that its nice and hot.
In a bowl, mix the flour, oil, baking powder, salt & pepper and then add the water. Mix to form a dough and knead a little so that it comes together and then divide into two.
On a floured chopping board, roll out the dough and then place on a griddle pan (griddle pans work the best as you get lovely charred stripes on the flatbread, but a frying pan also works).
The flatbread will literally cook in a couple of minutes, simply flip it over when the underside is charring and cook on the other side a minute longer.