Preheat oven to 350°. Pulse first 4 ingredients in a food processor 10 to 12 times or until mixture resembles coarse meal. Firmly press on bottom and up sides of 8 (3 3/4-inch) round tart pans with removable bottoms (about 7 Tbsp. per pan). Place tart pans on a baking sheet. Bake 25 to 30 minutes or until lightly browned. Cool completely on baking sheet on a wire rack (about 30 minutes).
Melt 2 Tbsp. butter in a large skillet over medium-high heat; add apples and brown sugar. Cook, stirring constantly, 8 to 10 minutes or until tender and caramelized. Remove from heat, and stir in bourbon. Cool completely (about 30 minutes).
Let ice cream stand at room temperature 10 minutes or until softened; place ice cream in a large bowl, and stir in apple mixture. Cover and freeze 4 hours or until firm. Serve in tart shells with Caramel Sauce and pecans. Garnish, if desired.