Prepare pie crusts according to package directions for a two-crust filled pie (do not bake). Place on baking sheet; set aside.
In medium bowl combine 1/3 cup brown sugar, flour, cinnamon, nutmeg and salt. Add apple slices and pecans; toss to coat. Transfer apples to pie crust.
In small saucepan over medium heat, melt butter and remaining brown sugar, stirring frequently. Bring to a boil; boil 1 minute. Let cool slightly. Pour over apple mixture.
Top pie with remaining pie crust and crimp edges according to package directions. Lightly brush crust with milk and sprinkle with granulated sugar, if desired. Bake in a preheated 400°F oven 45-55 minutes or until crust browns and juices bubble. Remove from oven; cool slightly.