Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   5      ounces        plain yogurt
   2      tablespoons   veg. oil
   2      tablespoons   fresh lemon juice -- ( or bottled )
   4                    garlic cloves -- chopped
   2                    green chiles -- chopped ( optional )
   3      tablespoons   fresh mint leaves -- chopped
   3      tablespoons   fresh coriander leaves -- chopped
   3      tablespoons   green masala paste
   1      teaspoon      cumin seeds -- roasted and ground
   1      teaspoon      garam masala -- ( see link )
     1/2  teaspoon      salt
   4      ounces        milk

Preparation:

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