Sift flour, baking powder, baking soda and salt together in a bowl.
Stir in egg, yogurt and 2 tablespoons of the butter. Gradually stir in enough milk to make a soft dough. Cover with a damp cloth and place in a warm place for 2 hours.
Preheat oven to 400 degrees F (205 C) (Note: I use even higher temp 500F and place a pizza stone in my oven)
Knead dough on a floured surface for 2 or 3 minutes until smooth.
Divide into 8 pieces Roll each piece into a ball then into ovals about 6 inches long.
If you must use a baking sheet, grease it and brush the underside of the bread with water. Brush the other side with butter and sprinkle with poppy seeds
Bake 6 to 10 minutes until puffy and golden brown. (This is where the stone makes a difference)