Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
 500      grams         potatoes
   2      tablespoons   vanaspati
   1      teaspoon      mustard oil
   2      whole         red chiles
     1/4  teaspoon      cumin seeds
   2      small         onions -- minced
   1      teaspoon      red chile powder
   1      tablespoon    turmeric
   1      teaspoon      garam masala powder
     1/2  teaspoon      sugar
                        salt -- to taste
   1      piece         ginger -- (1-inch)
   1      small         tomato -- cut in large chunks
 450      milliliters   water -- (3 cups)

Preparation:

Boil potatoes. Peel potatoes and cut into equal pieces. Heat oil in pan. When it smokes, put in chiles and cumin seed. Add onion and fry it until brown. Add chile powder, turmeric, garam masala, sugar, salt, ginger and potato pieces. Keep stirring for 5-7 minutes. Add tomato and 1 cup water. Cook on medium heat until water absorbed. Serve with fluffy puris.