1/2  cup           unsalted butter
   1      tablespoon    curry powder
     3/4  cup           Granny Smith apple -- chopped
     1/4  cup           onion -- finely chopped
   1      clove         garlic -- minced
                        salt  -- to taste
     1/4  cup           flour
     1/2  cup           yogurt -- plain
     1/2  cup           cream
   2      cups          chicken  -- cooked and shredded
   3      cups          rice  -- cooked
   4                    avocado -- sliced
Preheat oven to 350F. Melt butter in a large saucepan over medium heat.
Stir in
  curry powder and saute apples, onions, and garlic until tender. Salt to
 taste.
  Stir in flour, add yogurt, cream, and stock gradually, mixing well after
 each.
 Cook until sauce is smooth and thick, stirring constantly. Add chicken.
Place cooked rice in the bottom of a shallow, buttered baking dish. Top
with av
ocado slices followed by chicken mixture. Bake 10 minutes, uncovered.