Preheat oven to 350.
Combine first 10 ingredients, stirring well with a whisk. Stir in pecans. Roll dough into a 13-inch circle; fit into a 9-inch removable-bottom tart pan coated with cooking spray. Trim excess crust using a sharp knife. Spoon sugar mixture into prepared crust. Bake at 350 for 45 minutes or until center is set. Cool completely on a wire rack.
Place chocolate in a microwave-safe bowl; microwave at high 1 minute. Stir until smooth. Drizzle chocolate over tart.