In a medium bowl, combine the water, yeast, and 1 teaspoon of sugar. Let the mixture sit until it’s foamy on top, about 5 minutes.

In a large mixing bowl or stand mixer fitted with a paddle attachment, combine the flour, salt, and remaining tablespoon sugar. Add the yeast mixture, oil, and yogurt, and mix to combine. Knead the dough, either in the stand mixer on medium speed or by hand on a clean work surface, adding more flour if needed, until it’s soft and slightly sticky, 7 to 10 minutes. Transfer the dough to an oiled bowl, cover with a towel or plastic wrap, and let rise until it’s doubled in size, about 2 hours.

Preheat the oven to 500°F and line two baking sheets with parchment paper.

Turn the dough out onto a clean work surface and divide it into 12 equal balls. Cover and let rise an additional 20 minutes.

Roll the balls out into circles that are 1/4 to 1/2-inch thick. Place them onto the baking sheets an inch apart, then bake, one sheet at a time, until they’re puffy and lightly browned on top. Begin checking at 5 minutes. We bake them for about 8 minutes, rotating the pan after the 5 minute mark if one side of the sheet is puffing up more than the other. Transfer the pitas to a wire rack to cool.