How many different things can you use for a pizza base?

* Traditional pizza dough: Made from flour, water, yeast, and salt.

* Whole wheat pizza dough: Made with whole wheat flour instead of all-purpose flour.

* Rye pizza dough: Made with rye flour instead of all-purpose flour.

* Sourdough pizza dough: Made with a sourdough starter instead of commercial yeast.

* Gluten-free pizza dough: Made with gluten-free flour instead of all-purpose flour.

* Cauliflower pizza crust: Made with cauliflower rice instead of flour.

* Zucchini pizza crust: Made with zucchini noodles instead of flour.

* Sweet potato pizza crust: Made with sweet potato puree instead of flour.

* Black bean pizza crust: Made with black beans instead of flour.

* Tortilla pizza crust: Made with a tortilla instead of pizza dough.

* Pita bread pizza crust: Made with pita bread instead of pizza dough.

* Naan bread pizza crust: Made with naan bread instead of pizza dough.

* Puff pastry pizza crust: Made with puff pastry instead of pizza dough.

* Crescent roll pizza crust: Made with crescent rolls instead of pizza dough.

* English muffin pizza crust: Made with an English muffin instead of pizza dough.