Created by KittenCal on October 31, 2011
Step 1: In a large microwave-safe bowl (I use my 8-cup Pyrex measuring cup) whisk together the sugar with cornstarch, lemon zest, lemon juice, egg yolks, light cream and whipping cream.
Step 2: Microwave on HIGH removing every minute to stir; cook until thickened and bubbly (this will not take long).
Step 3: Stir in butter until melted, the stir in the sour cream until well blended.
Step 4: Pour into cooled pie crust, then refrigerate until cold.
Step 5: Top with sweetened whipped cream when pie is cold.