Remove pie crust from pouch; place flat on cutting board. Cut crust into 1/2-inch-wide strips. Place half of the strips, about 1/2 inch apart, on filling mixture. Weave a cross-strip through center by first folding back every other strip of the first layer of strips. Continue weaving cross-strips with second half of strips, folding back alternate strips before adding each cross-strip, until lattice is complete. Trim ends as needed. Brush crust with milk; sprinkle with sugar.