In a measuring cup/small bowl combine water, yeast and 1 tsp for sugar. Let the mixture sit until foamy, around 5 minutes.
In a stand mixer bowl with a paddle attachment combine flour, salt and 1 tbsp sugar.
Add the yeast mixture, olive oil and yogurt, mix at low speed until everything comes together.
Change to dough hook and knead the dough at medium low speed for 10 minutes. The dough should be soft and slightly sticky at the end of 10 minutes.
Transfer the dough on a clean work surface and form into a ball.
Oil a large bowl and transfer the dough ball in it, cover with plastic wrap and let it rise until double in size. Around 2 hours.Tip: Put a piece of tape on side of the bowl at approximately where double the height of the dough would be. Preheat the oven to 500 F. Line two baking sheets with parchment paper and set aside.
Turned the the raised dough on a clean work surface and divide into 12 equal balls. Cover them with plastic wrap and let them rise for another 20 minutes.
Work on one ball at a time; roll it into 4 to 5 inch circles and place them onto prepared baking sheet.
Make sure the rolled pitas do not overlap.
Bake one sheet at a time for about 8 minutes, rotating the tray after 5 minutes.
Transfer the pitas to a wire rack to cool completely.