Steam or boil banana ( do not cut) until the banana is well cooked and soft (do not over cook banana)
Remove the skin and mash it well without any lumps or grind it well without adding water (the same consistency of chappathi dough)
In a pan heat ghee and add cashews ,raisins and saute for few minutes
Then add grated coconut along with sugar and cardamom powder and then saute for few minutes
Remove from fire and let it cool
Now make a small lemon size ball from the banana dough and flatten it in your palm into a small round shape
Keep 1 tbsp of the filling and cover the edges lightly and roll it in your palms
Shape it like unnakkaaya( the shape as in the pic)
Coat it in the all purpose flour and fry in hot oil
Keep turning the side and take off the flame when golden
Drain the excess oil and serve hot