Preheat oven to 350°. On a lightly floured surface, roll dough to a 1/8-in.-thick circle; transfer to a 9-in. pie plate. Trim crust to 1/2 in. beyond rim of plate; flute edge. Refrigerate while preparing filling.
In a small saucepan over low heat, or in the microwave, melt chocolate and butter. Cool.
In a small bowl, beat eggs until light; add flour and mix well. Add sugar, corn syrup, vanilla and salt. Stir in melted chocolate and pecans. Pour into pie crust. Bake until top is crusty and filling set, 40-45 minutes. Serve warm with a scoop of ice cream.
Combine 1-1/4 cups all-purpose flour and 1/4 tsp. salt; cut in 1/2 cup cold butter until crumbly. Gradually add 3-5 Tbsp. ice water, tossing with a fork until dough holds together when pressed. Shape into a disk; wrap and refrigerate 1 hour.