In a large mixing bowl, combine the active sourdough starter, flour, water, olive oil, and salt.
Mix until a rough dough forms, then turn it out onto a floured surface and knead until smooth and elastic, does not have to be completely smooth.
Perform 3 set of stretches and folds, 30 minutes apart.
Place the dough in a lightly oiled bowl, cover with a damp cloth, and let it rise at room temperature for about 4-8 hours until it has doubled in size. For a more intense sourdough flavor, you can let it rise in the refrigerator overnight.
Preheat your oven to 450 degrees F.
Divide the dough into 6 equal portions for 6 medium-sized pizzas.
Roll out one dough ball on a floured surface to your desired thinness. You can use a rolling pin or stretch it by hand. Don't use a lot of flour because it makes it spring back together and you want it thin.
Carefully transfer the rolled-out dough onto a piece of parchment paper for easy handling.
Add your sauce, cheese, and favorite toppings.
Brush the edge of the pizza with butter or olive oil with a pastry brush.
Carefully slide the parchment paper with the assembled pizza onto a piece of parchment paper. Place the parchment on a pizza pan.
Bake for about 10-15 minutes or until the crust is crispy and the cheese is melted and bubbly.
Remove the pizza from the oven and serve immediately.