This is a pretty bar cookie to add to a holiday treat tray, and a nice change from the usual citrus bars of this type. May be garnished with fresh raspberries and mint leaves for extra visual "pop".
optional
Preheat oven to 325°F.
CRUST: Place almonds and confectioners sugar in food processor or blender and process until nuts are finely chopped; set aside.
Cream butter in small mixer bowl.
Add sugar; mix until light and fluffy.
Stir in nut mixture and flour.
Pat dough evenly into greased 8-inch square pan; prick with fork.
Bake 30-35 minutes, or until edges are light brown and top is still pale.
TOPPING: Combine egg yolks and sugar in medium-size heavy saucepan.
Stir in juice concentrate, butter and salt.
Cook over medium heat, stirring constantly with a wire whisk, 6-8 minutes (do not boil).
When mixture reaches 180° to 185° F on a candy thermometer, remove from heat.
Stir in food coloring if using, and spread mixture over baked crust.
Return to oven and bake for 5 minutes.
Remove from oven and cool completely in pan on a wire rack.
Cut into bars or diamonds to serve.
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