Combine yeast, water and sugar. Give a quick mix and set aside until foamy, about 10 minutes.
Add to flour, yogurt, oil & salt in a mixer and use a dough hook mix about 10 minutes or until smooth and pulled away from the sides and in a ball.
Put into a lightly oil bowl, cover with a damp towel and set aside in a warm place for 60 minutes.
Put on a floured surface and roll into an even log and cut into 8 pieces, then turn each into a round ball.
Flatten with a rolling pin into a 6-8 inch circle and cook in a medium hot, lightly oiled pan a couple minutes a side until bubbly and flip.