Stir in unsweetened peanut butter, fish sauce and palm sugar. Nutmeg powder to be added now if using.
Take Kaffir lime leaves on your palm and crush it. Add crushed kaffir lime leaves to the pan. Note - If you can’t get palm sugar , substitute with brown sugar or jaggery. Crushing kaffir lime leaves helps release its wonderful aromatic oil, making Panang curry flavorsome.