Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   3      Tbsp          Oil
   6                    curry leaves
     1/4  teaspoon      mustard seeds
     1/2                onion -- finely chopped
   2                    green chilies -- finely chopped
   1      pinches       turmeric
   2      medium        potatoes
     1/2  teaspoon      salt

Preparation:

Heat the oil in a small saucepan, add the curry leaves and mustard seeds, then cover and cool, off the heat, for a couple of minutes. Add the onion, chilies and turmeric and sauté for 5 minutes. Meanwhile, dice the potatoes. Add them to the pan, toss in the salt and pour in just enough water to cover. Simmer gently until the potatoes are tender. This masala should be fairly dry and medium-hot to taste.