The night before you bake the flatbread, make the dough. In a large bowl, stir together the flour, 1 tsp salt, and yeast. Add 3/4 c water and stir the dough. Continue adding water until a sticky, shaggy ball of dough forms. Loosely cover with plastic wrap and let rise at room temp for 12-24 hours, until dough has doubled (at least) in size and is very bubbly.