Prep Tip: To quickly cook a sweet potato, pierce it several times with a fork and then microwave on medium, 5 min.
Family-Style Tip: Spoon filling into a 10-in. baking dish. Roll out pastry topping into a 12-in. circle and lay over filling. Fold overhanging pastry edges under rim of dish. Press tines of a fork against edge of pie to help seal. Brush pastry with egg wash and sprinkle with pepper. Cut a steam vent into pastry. Bake in centre of oven until pastry is golden and filling is bubbly, 25 to 30 min.
Adapted from Bobby Flay’s Bar American Cookbook, 2011.