1 (9 or 10 inch) baked pie shell or graham cracker crust
6 egg yolks
2 (14 oz.) cans sweetened condensed milk
1 (8 oz.) bottle lime juice
Whipped cream or Cool Whip

Preheat oven to 325 degrees. In large mixer bowl, beat yolks with milk and lime juice. Pour into prepared pastry shell; bake 40 minutes, cool. Chill. Top with whipped topping to serve. Keep refrigerated.