Mix (A) well and leave aside. Heat oil and saute spices till fragrant. Add sugar and shredded radish. Stir well to dissolve the sugar. Blend in (B), (A) and (C). Cook over medium flame till batter is thick and sticky.
Steam a well-greased 25cm square tray over boiling water. Pour cooked batter into tray and steam for about 30 minutes.
Immediately after steaming, garnish with pounded groundnuts. Leave to cool, preferably overnight, then cut into diamond-shaped slices.