OR
Instructions:
Preheat the oven to 325º F. Combine the condensed milk, lime juice, and eggs. Whisk them together until well-blended and then pour into the pie shell. Bake in oven for 15 minutes and let chill for at least 2 hours. When it's all chilled and set, combine the sour cream and powdered sugar and spread it on top of the pie with a spatula. Sprinkle the lime zest on top as garnish and make sure it's served nice and chilled.