Add the water, oil, and sourdough starter to a glass bowl and mix.
Add the flour and salt and fold it into the wet ingredients.
Continue folding/mixing until the dough comes together.
Allow it to rest for 15 to 30 minutes for the dough to autolyse. This allows the einkorn flour to absorb all of the moisture.
Next, knead the dough on a floured surface for 2-5 minutes until the dough is no longer sticky and the gluten is slightly developed. (it won't be elastic like bread dough, but it will stay together and lose its stickiness)
Place the dough in a bowl and cover it with a lid or plastic wrap, a plate works great too! Allow it to ferment for at least 30 minutes or all afternoon.
When you are ready to make your tortillas preheat a cast iron skillet over medium heat.
Divide the dough into 8 equal pieces.
Roll out the dough on a piece of floured parchment paper into a nice thin circular shape.
Grease your hot skillet with butter, lard, or your preferred oil.
Cook the tortillas for roughly 1 minute on each side or until they bubble and brown.