In medium saucepan melt morsels and butter, stir in crumbs and nuts. Press half of mixture firmly onto bottom of a greased 13x9x2 inch baking pan. In large mixer bowl, beat cheese until fluffy, beat in condensed milk, vanilla, and egg, mix well. Pour into prepared pan, top with remaining crumb mixture. Bake at 350 degrees for 25 to 30 minutes or until toothpick inserted near center comes out clean. Cool at room temperature, chill before cutting into bars. Refrigerate leftovers.