These miniature Leek Asparagus Tarts are so dainty. Garnish them with something fresh and green for a perfectly dainty springtime appetizer.
Combine flour, butter and salt in a food processor and pulse until a crumb mixture forms. Add egg and water and continue to pulse just until dough comes together.
Preheat oven to 350°. Roll out dough to about 1/8 to 1/4 inch thick on a lightly floured surface. Using a 2 inch round cookie cutter, cut out rounds and gently press into an ungreased mini muffin pan. Prick each tart shell several times with a fork and bake for about 10 minutes or until beginning to turn golden. Remove from oven and let cool. Increase oven temperature to 375°.
Spoon filling into cooled tart shells and bake for approximately 15 minutes or until custard has set. Remove from oven and cool to room temperature. Garnish with micro greens just before serving.