Preheat the oven to 375 degrees F. Spread the pecan pieces and the chocolate chips evenly on the bottom of the pie shell. In a mixing bowl, whisk the remaining ingredients together. Pour the filling over the pecans. Bake for about 1 hour or until the filling sets. Cool for 30 minutes before slicing. Cut into individual servings and serve with a drizzle of Caramel Sauce and powdered sugar.