Preheat oven to 325ºF. Lightly grease an 11 x 17 x 1 1/2 inch pan. Mix ground walnuts with sugar, spices and lemon rind in medium bowl. Cut filo sheets to fit pan. Keep filo sheets moist and flexible by covering with a damp cloth. Brush 12 filo sheets lightly with melted butter and place in bottom of pan. Spread 1 cup of walnut mixture over top sheet. Cover with 4 sheets of filo after brushing each with butter. Then repeat layers. Make top layer with 8 sheets of filo after brushing each with remaining butter. With small, sharp knife, cut lengthwise through first layer to make strips 1 1/2 inches wide. Then make diagonal cuts 2 inches apart in top layer to form diamonds. Bake on rack above center of oven for 1 hour, until well browned. Remove from oven and cut through the first cuts, cutting to the bottom of the pan. Spread top with cold honey syrup (use recipe below). Let stand until completely cold before removing from pan.

Honey Syrup:
1 cup of honey
1/2 cup of sugar
1/2 cup of water
1 tablespoon of lemon juice

Combine honey, sugar and water in small saucepan. Heat, stirring until sugar dissolves. Remove from heat and stir in lemon juice. Cool thoroughly before using. Makes 1 1/2 cups.