1.Mix the flour, yogurt, egg, baking soda, and salt into a soft, slightly sticky dough.
2.Cover and let rest in a warm place for about 1 hour so the baking soda can fully activate.
3.With oiled hands, tear off pieces of dough, flatten into rounds, and fry in hot oil, spooning hot oil over the top as they cook to help them puff, about 2-3 minutes per side until golden.
4.Serve warm dusted with powdered sugar, or with jam, honey, or sirene cheese.