In a bowl, combine flour, salt and oil and mix well.
Add enough water to make a soft dough.
Cover and set aside for three or four hours. You can also leave it in fridge overnight.
Divide the dough into four equal portions.
Apply butter on the dough as well as the counter.
Roll it into a thin rectangular flat bread.
The bread should be transparent enough so that the counter can be seen through it, but be gentle as we don't want any holes on it.
Place sliced banana inside the centre.
Fold all the four sides of the bread to make a square pocket.
Now heat a tawa.
Drizzle ghee on the tawa and gently transfer the prepared pocket to it. Cook on both sides until brown and crisp.
Remove it on to a cutting board, slice it into 9 equal squares.
Drizzle condensed milk and chocolate sauce over it.
Sprinkle sugar and serve immediately.