To cook the beetroot, heat the oil in a pan and add the cumin seeds. When they start to sizzle, add the ginger and cook for a few seconds before adding the grated beetroot and mixing well. Pour in the water, cover and cook on low heat for 10 minutes, until the beetroot has slightly softened. Leave to cool slightly then purée in a blender.
To make the chapatti, combine all the dry ingredients in a bowl. Add the beetroot purée and mix well. Now add the water gradually, using just enough (or a bit more, if necessary) to form a soft dough. Cover the dough and leave to rest for 15 minutes.
Divide the dough into 12 portions. Dust a work surface lightly with flour and roll each portion to a thin circle 15 to 18 centimeters across.
Place a skillet over medium heat and, once hot, cook a chapatti for 1 minute on each side. Add a few drops of ghee to the skillet and continue cooking for a few more seconds until the chapatti is golden. Repeat with the remaining dough and serve them all warm.