Plantain Tart

Ingredients
Pastry:

Filling:
 * 2 cups all-purpose flour
 * 1 teaspoon salt
 * 1/4 cup cold butter, cut into 1/2 inch pieces
 * 3 tablespoons shortening, chilled and diced
 * 1 egg, beaten
 * 1 tablespoon ice-cold water


 * 3 very ripe (black) plantains
 * 1/4 cup white sugar
 * 1 teaspoon vanilla extract
 * 1 teaspoon grated nutmeg
 * 2 drops red food coloring (optional)
 * 1 egg white, beaten
 * white sugar for decoration

Directions

 * 1) Prepare the pastry by combining the flour and salt in a bowl. Rub in the butter and shortening until incorporated, and the mixture takes on a sandy appearance. Combine the egg and water, and stir into the flour mixture until a dough forms, then knead for a few turns to bring the dough together. Wrap well, and chill for 3 hours in the refrigerator.
 * 2) While dough is chilling, peel plantains and cut into thirds. Place into a small saucepan with a little water. Bring to a simmer and steam until tender, 5 to 10 minutes depending on how ripe your plantains are. Once soft, pour out the water, and mash plantains with sugar, vanilla, nutmeg, and red food coloring. Set aside to cool.
 * 3) Preheat oven to 350 degrees F (175 degrees C).
 * 4) Roll dough out on a lightly floured surface to 1/4-inch thick. Cut into circles using a 4 or 5-inch round cookie cutter. Spoon a little of the plantain filling into the center of each circle, then fold in half, to form a half-moon shape. Place the tarts on a baking sheet, brush with beaten egg white, and sprinkle with sugar.
 * 5) Bake in preheated oven for 20 to 25 minutes until golden brown. Allow tarts to cool to room temperature before serving.