Whisk water and sourdough starter until frothy.
Add sifted einkorn and salt. Start mixing starter water and flour with a spoon until it becomes too hard to do (chunks of dough forming).
Add olive oil, and knead with your hand for a couple of minutes, until the dough is smooth. Stop kneading once the dough starts to feel sticky. Cover, and leave at room temperature for 6 hours or so. Don't go too much longer otherwise you will have very sour pitas (einkorn ferments much quicker than other grains).
When ready to bake, place a cast iron skillet or a pizza stone in the oven, and turn it on to preheat to 450ºF.
Using a soft spatula, turn the dough onto a well floured work surface; the dough will be sloppy. Sprinkle flour on top.
Gently knead it into a soft ball adding more flour if needed to prevent sticking, but try not to go overboard with flour - we are trying to keep the dough moist and soft. Form a dough 'sausage' and separate it into 8 pieces. Form each piece into a ball, and keep them covered until ready to shape. Roll each ball out to about 6".
Bake each pita for 2 minutes on one side, flip with a soft spatula, and bake 1 more minute. You don't want to overbake or brown the pitas.
Keep cooked pitas on a plate lined with a napkin and covered with a towel to keep soft.