Whisk all the wet ingredients (except for the onions) until it is frothy (has bubbles), and then combine it with the onions and dry mixture.
Blend the dough mixture well, and then spoon out into 4 balls on a stick-free or lined baking sheet. I use a stick-free backing mat or parchment paper.
Slice across the top of each ball of dough to make an X, and then spray or brush some olive oil on the cross.
Bake for 15 minutes, and then lower the heat to 300 degrees F and bake for another 15 minutes.
These can be stored in the refrigerator and warmed up later. Reheat at 300 degrees F for about 6 minutes.