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.
In a small, heavy-bottomed saucepan, combine the sugar and water and bring the mixture to a boil, stirring often. Cook, stirring occasionally, until the mixture is a deep caramel color and has the consistency of a thin syrup, 10 to 15 minutes. Remove from the heat. Stir in the cream, return the saucepan to the high heat, and boil the sauce until it regains the consistency of a thick syrup, about 2 minutes. Cool.