Blend flour, powdered sugar and salt in processor. Add butter; process until coarse meal forms. Add water 1 tablespoon at a time; process until moist clumps form. Gather dough into ball; flatten into disk. Transfer to 9-inch-diameter tart pan with removable bottom. Press over bottom and up sides of pan. Pierce all over with fork. Freeze 30 minutes. Preheat oven to 350°F. Bake crust until golden, about 25 minutes. Cool. Maintain oven temperature. Whisk first 6 ingredients in medium bowl to blend. Pour into crust. Bake tart until filling is set, about 25 minutes. Cool tart completely in pan on rack. Chill until cold. (Can be made 8 hours ahead. Keep chilled.) Serve with Frozen Lime Cream.