From "Someone's in the Kitchen with Dinah" by Dinah Shore (Doubleday). Mix brown sugar, nuts and flour in a large bowl. Stir in the butter and mix with your hands until crumbly. Remove one cup of the mixture to be used later as a topping. Place remainder in an 8-inch square pan and press firmly. Bake at 350 degrees about 12 to 15 minutes. Beat cream cheese with the granulated sugar until smooth. Beat in the egg, lemon juice, cream and vanilla. Pour this onto the baked crust. Top with the reserved crumbs. Return to a 350 degree oven and bake about 20 minutes. Cool thoroughly, cut into 2-inch squares. These can be baked the day before serving. Cover with plastic wrap and keep refrigerated. Makes 16 cookies.