These are really easy to make and are both filling and healthy! All you need to do is make your regular rotis dough, here is my recipe for that.
Then, divide the dough into 9-10 balls as directed and start rolling out one at a time. Once rolled out as thin as you normally like, add your keema filling or any filling of your choice. I also like to add a dash of freshly ground pepper and drizzle a little bit of egg white, which helps hold the keema filling together. Then cover to form a half-circle and crimp the edges with a fork, as you can see from the pic.
Heat a tawa/chapati flat pan, and place the fold over on it, and on low heat cook it on both sides. You can add a tiny bit of oil whilst cooking it. Once both sides are nicely browned, remove and keep covered under a towel or cloth until ready to serve.
Here is the keema recipe that I used.