Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   5      ounces        plain yogurt
   2      tablespoons   vegetable oil
   2      tablespoons   fresh lemon juice
   4                    garlic cloves -- chopped
   2                    red chiles -- chopped ( optional )
   2      tablespoons   fresh coriander leaves -- chopped
   1      tablespoon    mild curry paste
   2      tablespoons   red tandoori paste
   1      teaspoon      cumin seeds -- roasted and ground
   1      teaspoon      garam masala
   1      tablespoon    tomato puree
     1/2  teaspoon      salt
 100      milliliter    milk

Preparation:

Put yogurt, oil, lemon, garlic, chiles, leaves and paste into blender and pulse until smooth as possible. Add remaining stuff, except milk, and pulse again. Add enough milk until mix is easy to pour. Color should be creamy scarlet. Put in fridge until needed.