Combine yeast, sugar and 50 ml of warm water. Wait till you see bubbles.
In a mixing bowl, combine refined flour and salt.
Add the sugar and yeast mixture. Mix.
Add yoghurt. Mix.
Add water and knead it to a smooth dough. If you knead with hand, knead for about 10 minutes.
Add oil. Knead again.
Round the dough, cover it and rest it for about 1 hour OR till the dough doubles in size.
Knock the dough and knead it once more.
Now, divide the dough into equal portions. You can divide it into approximately 25 parts, to make small kulchas.
Grease and dust the baking trays OR place a baking sheet on the baking tray.
Roll the dough ( approximately 6'' diameter). and place them next to each other on the baking tray.
Rest the rolled dough for about 30-45 minutes in a warm place OR till it rises and becomes light.
Preheat the oven to 200 deg C for about 10 minutes.
Sprinkle some water on the kulchas. Sprinkle some kasuri methi on the kulchas (They will stick to the kulchas).
Bake them for about 7-8 minutes.
Once done, remove and let them cool on a wire rack.
Once cooled, you can keep them in a bread box with a tight lid till further use.