In a medium saucepan, combine sugar, cornstarch, and salt. Whisk in the half-and-half and cook over medium heat until mixture is thickened and bubbly, stirring occasionally.
3
Remove from heat, add butter, brown sugar, and vanilla and stir until butter is melted. Pour into baked pie shell and sprinkle lightly with cinnamon.
4
Bake 35 minutes; center of pie will not be set. Cool pie 1 hour, then refrigerate 6 to 8 hours, or until ready to serve. Pie will set upon chilling. Cover for longer storage.