Instructions: 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.

This recipe yields 4 servings.

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