In a bowl add wheat flour, semolina, salt, ajwain and ghee and mix thoroughly. Add water little at a time and make a stiff dough. Let it set for 10 minutes.
Roll dough into thick circle of about 12 inches. With a knife slash the roti or use a fork to make indents. Flip it and pinch the roti with thumb and index finger or you can use a small crimper to pinch.