Bake puff pastry shells as package directs.
Combine apples, brown sugar, pecans, butter, lemon juice and cornstarch in a medium pan, stirring until cornstarch dissolves; bring to a boil. reduce heat to low; cook uncovered about 10 minutes or until apples are tender. Spoon hot filling into pastry shells. Glaze while warm.
To make glaze, combine butter and powdered sugar in a small bowl. Add milk to make proper consistency.
Please Note: Nutritional values listed may vary from final results depending on actual measurements and brands used to prepare the recipe.