Crust 3/4 cup graham cracker crumbs 1/2 cup walnuts -- toasted, finely chopped 1/4 cup firmly packed brown sugar 1/4 cup margarine -- melted Topping 1/3 cup firmly packed dark brown sugar 1/3 cup whipping cream 1/2 cup chopped toasted walnuts

Filling 24 ounces cream cheese -- softened 14 ounces sweetened condensed milk 3 eggs 2 teaspoons vanilla

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  Preheat oven to 300 f. Combine crumbs, walnuts, sugar and margarine. Press into a 9" springform pan. In large mixer bowl, beat cheese until fluffy. Gradually beat in sweetened condensed milk, then eggs and vanilla until smooth. Pour into pan. Bake for 55 minutes or until center is set. Cool. Top with Walnut Praline Topping. chill. Refrigerate leftovers.

  Walnut Praline Topping: In saucepan, combine 1/3 cup each firmly packed dark brown sugar and whipping cream. Cook and stir until sugar dissolves. Simmer for 5 minutes or until thickened. Add 1/2 cup chopped toasted walnuts.