Mysterious Flatbread

as promised, good with lentil soup -
you have to think ahead, but its easy and doesn't require heating up your oven on a hot day 

Mysterious Flatbread from More Home Cooking by Laurie Colwin
(begin the night before or in the morning)

Stir together
2 T warm water
1 t yeast
2 T yogurt
 Mix in
1/3 cup flour
2 t sugar

leave overnight or all morning, or 3 hours in a warm place

In a bowl combine
2 cups flour
2 t salt
1 T black onion seeds (called Kalaunjii or Kalonji, optional, but good)
Add
yogurt starter
1 cup warm water

Knead on floured board, kneading in additional 3/4 cup flour

Let rise 2 hours or until doubled

Divide dough in half, flatten as for pizza, and cook on heated griddle until brown and speckled on both sides (about 5 minutes) then lower heat and cook 10 minutes more. finished bread will sound hollow when tapped