In large bowl, beat eggs, brown sugar, 3/4 cup maple syrup, the melted butter, flour and salt. Stir in apples and walnuts. Pour into crust-lined pan. Make lattice top using remaining crust. Cut crust into 1-inch wide strips. Place half of the strips across filling in pie plate. Place remaining strips crosswise across first strips. Trim ends of strips; seal edges. Brush top with milk.