Take a pan add sweet potato add water cook till potato's are boiled,or u can use presure cooker.
once it is boiled remove the skin and cut into small pieces and mash it.
In another bowl add maida,rice flour,salt,ghee,rava mix well and add water make into a soft dough and keep a side for 30min
In a pan add the mashed potato, switch on the flame add sugar mix well cook for 5 min to 10min once it is done keep a side till it cools down, then add cardomom powder mix well.
Now take the dough and double the quantily of potatomixture, stuff make a poori size chapati and cook both the side with ghee.