Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      cup           olive oil
   1                    salt + freshly ground pepper
   2      tablespoons   vinegar -- up to 3
   1 1/2  cups          grated feta
   2                    garlic cloves -- crushed, up to 3
   1      cup           milk or buttermilk
   1      teaspoon      dried dill weed

Preparation:

In a blender or food processor, whirl all ingredients except the milk for one minute. With the blender running, slowly pour in milk. As soon as the dressing thickens, turn off the blender or the dressing will separate and become runny. It should be thick and creamy. Chill at least 30 minutes.