Heat clarified butter /desi ghee in a non stick pan..put boiled, peeled and mashed potatoes in it and cook fo' about 10-15 minutes at medium to slow flame till golden in colour and released ghee at the edges..add sugar and stir to incorporate well the sugar in halwa..add milk at this stage(this step is completely optional)..add cardamom powder,nutmeg powder, black pepper powder, sliced dry fruits and give a good mix