Instructions: Roll pastry into a 17 x 13 inch rectangle. Cut pastry into 4 inch squares; place squares on ungreased baking sheets. Combine egg yolk and water; brush edges of pastry with yolk mixture. Fold each square of pastry into a triangle; press edges of foldover together with a fork. Bake at 425 degrees for 13 to 15 minutes or until foldovers are puffed and golden brown. Let foldovers cool on a wire rack. Combine mangos, brown sugar, mac nuts, butter, lemon juice, and cornstarch in a medium saucepan, stirring until cornstarch dissolves; bring to a boil. Reduce heat to low; cook, uncovered, about 3-4 minutes. Slice foldovers in half horizontally, not cutting completely through long side of pastry. Spoon hot filling into foldovers; sprinkle tops with powdered sugar.

Yield: 1 dozen.

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