Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      cups          cooked black beans
   1      cup           cooked kidney beans
   4      tablespoons   finely grated ginger
   4      cloves        garlic -- minced
   2                    ripe tomatoes -- finely chopped
   2      tablespoons   ground cayenne pepper
   2      tablespoons   salt
     1/3  cup           butter
     1/2  cup           half-and-half
   2      tablespoons   garam masala

Preparation:

Place half the beans in a bowl. Using a potato masher, beat or mash until they form a coarse puree. Place mashed and whole beans in a large pot. Add the ginger, garlic, tomatoes, cayenne, salt, butter, cream, and garam masala to the beans. Cover with just enough water to cover beans. Cook for 30 minutes. To serve, sprinkle bowl of Dal Makkhani with finely diced purple onion and chopped cilantro, if desired.