Preheat oven 375.

Microwave first three ingredients in large microwave safe bowl on high 1-1 1/2 minutes or until melted and smooth, whisking at 30 second intervals.

Whisk flour and sugar into mixture. Add eggs one at a time, whisking until just blended. Whisk in vanilla and salt. Pour into pie shell.

Bake at 376 for 35-40 minutes or until set. Cool 10 minutes and serve with ice cream or whipped cream.