This post is for Ria of Me and India, as reassurance that you don't have to have the absolutely perfect cooking implements in order to make rotis! Here, I am using a plastic cutting board in place of a marble chakla and a nonstick pan instead of a tawa. Basically you just need a small rolling pin, a flat surface, a nonstick pan of some sort, and a wire rack. You can do wonders with that.
I'll skip the dough-making part in pictures. You need to make a springy dough that doesn't stick (too much) to your hands when it's all mixed in. Some people add salt to their rotis. I usually forget. I don't make them with oil either - for me, it's just flour (here I am using regular whole wheat flour from any grocery) and water.
Take a ball of dough about the size of a small lime and roll it in your hands until it becomes round. Then squish it in a little bit of flour. The rounder the squished ball, the rounder the roti will be. Dip the other side in flour too, then place on your rolling surface.
Don't kill the dough. Roll it gently. You may find it 'spins' underneath your rolling pin; that's good. Try to get it an even thickness. Evenness is more important than thinness. My mother-in-law's rotis are thicker than mine and much tastier.
Now it's flat.
Pick up and immediately place onto your preheated tawa or nonstick pan. If you have an electric stove, set it at about 7 or 8. You'll know if it's too high. Make sure you also have a second burner turned on and preheated to about 8 or 9. Put your roti rack over it so you remember it's on and don't burn yourself.
Let this sit until a bubble or two starts forming. This will be maybe 10-15 seconds. Then flip it over and let the other side cook for about 15-20 seconds. Not too long. You can use a spatula to flip the roti or use your hands. I always use my hands. Don't burn your wrists on the side of the pan though, like I often do.
The bubble means it's ready to flip over.
A handheld rack also allows you to move the roti to the 'hotspots' on the burner so that it puffs evenly.
Once it puffs, carefully take it with your hand and flip it to the other side, and puff the other side.
Again, the rack is NOT TOUCHING the burner. You can do that if you like eating burnt rotis.
If it doesn't puff, don't despair. Just put it in the casserole and start on the next one. It's still edible. Practice makes perfect though, so obviously the only way to get good at this is to make and eat a lot of rotis. Tasty practice. :)