Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      cups          chestnut flour
   2      tablespoons   sugar
     1/4  cup           walnut pieces
   2      cups          milk
   2      tablespoons   virgin olive oil
   2      tablespoons   chopped fresh rosemary leaves
   2      cups          seedless red grapes
   1      cup           sugar

Preparation:

Preheat oven to 375 degrees. In a large mixing bowl, place flour, sugar and walnuts. Add 1/2 cup cold milk and slowly add rest of milk, stirring constantly to avoid lumps to form in batter. Grease pan with 1 tablespoon oil and pour in batter. Drizzle top with remaining oil and distribute rosemary evenly over top. Bake for 45 minutes, or until a toothpick pierced in the center comes out clean. While castagnaccio is cooking, place grapes and sugar in a small saucepan over medium heat. Cook until quite soft and bubbly, about 10 minutes. Remove castagnaccio from the oven and serve either warm or cool with grape sauce. Source: MOLTO MARIO with Mario Batali From the TV FOOD NETWORK - (Show # MB-5725)