3/4 cup butter
1-1/2 cups all-purpose flour
1 egg
1/2 tablespoon ice water
Filling:
8 ounces (1 cup) almond paste
2 tablespoons fresh orange juice
1 tablespoon grated orange rind
1 egg white
Glaze
1 egg yolk
2 tablespoons milk
Cut butter into flour until butter is the size of split peas. Beat whole egg with the vinegar. Pour mixture over flour and butter; toss with fork to make a dough that holds together. Add tablespoon of ice water. Gather into a ball; cover and chill.
Prepare the filling:
Mix the almond paste with the orange juice and orange rind. Stir in egg white and blend until smooth and paste-like.
Prepare the glaze mixture:
Roll out pastry to 1/4-inch thickness. Cut into triangles with 4-inch sides. Place a teaspoonful of the filling in center of each pastry triangle. Place on cookie sheet; brush with glaze mixture. Bake at 400 degrees for 15 minutes or until golden brown.