In a food processor, add the flour, water, sugar and yeast. Mix until a dough ball forms. Using the least amount of flour necessary, knead a few times until smooth. NOTE: Most food processors include a plastic dough blade, but you could certainly do this in a stand mixer with a dough hook or even by hand.
Cover and let rise until doubled in size. Mine took about an hour to accomplish this.
Turn the dough out on a lightly floured work surface, kneading until smooth. Divide into eight (or six as I did) equal pieces. Roll into smooth balls and place on the parchment pieces that are approximately 5" square.
Once on the parchment, it becomes a bit easier to manage and you can roll into rounds about 4" in diameter.
Pull on one edge of the rounded dough and fold it over in half, essentially creating a taco. Place into steamer basket (no heat yet). Cover once again, and let rise for another hour. The dough should be nearly double or tripled in size.
Bring the water beneath your steamer to a boil and steam the buns for about 15 minutes. Remove from heat for 5 minutes (cover still on). Remove from steamer and cool before splitting. I just used my fingers to split the buns.