Prepare Tart Crust: Process pecans in a food processor 10 to 12 seconds or until finely ground.
Beat butter at medium speed with an electric mixer 1 minute or until creamy. Gradually add powdered sugar and salt. Add egg, beating just until blended; stir in vanilla. Stir together flour and processed pecans; gradually add to butter mixture, beating at low speed until mixture is no longer crumbly and forms a ball, pulling away from sides of bowl. Press dough on bottom and up sides of a 9-inch deep-dish tart pan with a removable bottom. Chill 1 hour or until firm.
Preheat oven to 350°. Line crust with aluminum foil, and fill with pie weights or dried beans. Bake 20 minutes. Remove weights and foil; bake 12 to 14 more minutes or until crust is light brown. Cool completely on a wire rack (about 30 minutes). Increase temperature to 425°.
Prepare Cream Cheese Layer: Beat cream cheese, sugar, and egg at low speed with an electric mixer until smooth. Stir in orange zest. Spread over bottom of crust.
Prepare Pumpkin Layer: Whisk together pumpkin and next 5 ingredients until smooth; pour over cream cheese layer in crust. Cover tart edges with aluminum foil.
Bake at 425° for 15 minutes; reduce temperature to 350°, and bake 45 to 55 more minutes or until a knife inserted in center of pumpkin layer comes out clean. Transfer to a wire rack, and cool completely (about 1 hour). Cover and chill 8 to 12 hours.
Gently blot any moisture that collected on top of tart during chilling with a paper towel. Spread Honey Swiss Meringue over tart. Brown meringue using a kitchen torch, holding torch 1 to 2 inches from meringue and moving torch back and forth.