Preheat oven to 400°F. In a mixing bowl, combine sweet potato purée, chickpea flour, chia, baking powder, and salt to taste.
On two parchment lined baking trays, spread the mixture into two circles about ¼ -inch thick. Place another piece of parchment paper on top and flatten the pizza dough.
Bake the pizza crust in the oven for 10 minutes.
Spread the pizza sauce on the crust base and top with tomatoes and mozzarella. Bake for 15 minutes and then broil the pizza for another 5 minutes until golden.
Top pizza with basil, olive oil, Parmesan cheese, and chili flakes.