Ok, here's the Sourdough Recipe. It's a bread recipe and we just adapt it for pizza:
Starter:
1 cup milk
3 Tbsp plain yogurt
1 cup flour
Warm 1 cup of milk to 90-100 degrees and then stir in 3 T plain yogurt. Pour mixture into warm 3-6 cup container with airtight lid. Cover and let stand in warm 80-90 degree place until consistency of yogurt about 18-24 hours. If it turns pink, trash it and start again. When thick enough not to flow readily when tilted, add 1 cup of flour and stir until smooth. Cover and let set until bubbly (2-5 days) If there is clearish liquid, stir it but again, if it turns pink, trash it and start again. To store, cover and refrigerate or if temperatures are not too extreme can let set covered on counter. Feed at least once a month with 1 cup of warm milk (90-100 degrees) and 1 cup flour. Build up the amount in the container the same way and let set several days to sour again before use. Always have at least one-two cups left to regenerate new additions. (Don’t use up all of starter, or you will have to start again!)
Sourdough Bread:
1 1/3 C warm water
1 1/3 C starter
4 C plus bread flour
1 heaping T sugar
1 tsp salt
1 pkg active dry yeast
Place warm water in warmed bowl and add yeast to soften then add other ingredients with flour last. Continue to add flour and knead until pliable consistency. For bread let rise 1 hour (For pizza roll it out and then let it rise 15 minutes or less) and then bake at 400 degrees (up to 450 for pizza). Note: You do not punch down dough and let rerise. There is only one rise period.
We like the pizza crust to be crunchy and chewy at the same time so we prebake the crust 15-17 minutes until it starts to brown. Then we add the toppings and bake until the cheese is right. For calzones we obviously don't prebake it - just fill it and bake until the crust is the color we want.