Key Lime Pie

Quick and easy!  Makes 2 pies

2 graham cracker crust
2 can (24 oz) sweetened condensed milk
1/2 c sour cream
3/4 c key lime juice
2 egg yolks
Zest 1 lime
Whipped cream to top

Preheat oven to 350.  Combine all ingredients except crust and cream in a mixing bowl and beat for 2 minutes.  Pour into crusts and bake for 15-20 minutes.  Filling should only slightly jiggle.  Do not allow to brown.  Cool then chill for at least 3 hours.  Top with whipped cream.