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Key limes can now purchased at well-stocked markets during their winter and early spring season, but regular limes work, too.
Recipe courtesy of "The Illustrated Kitchen Bible: 1,000 Family Recipes from Around the World" by Victoria Blashford-Snell, copyright 2008. Used by permission of Dorling Kindersley Limited. All rights reserved.
| 1 1/2 cups graham cracker crumbs | 4 large egg yolks | |
| 2 tbsp sugar | 3/4 cup heavy cream | |
| 5 tbsp butter, melted | 2 tbsp confectioner’s sugar | |
| 15 key limes or 6 limes | 1/2 tsp pure vanilla extract | |
| one 14 oz (400 g) can condensed milk |
Preheat the oven to 350°F (180°C). To make the crust, mix the graham cracker crumbs, sugar, and butter in a bowl until combined. Press firmly and evenly into the bottom and sides of a 9in (23cm) tart pan with a removable bottom. Place on a baking sheet and bake until the crust looks set, about 12 minutes.
Meanwhile, grate the zest of 6 key limes (or 2 limes) in a bowl. Juice 14 key limes (or 5 limes). You should have 1/2 cup lime juice.
Add the condensed milk, yolks, and lime juice to the bowl and whisk well. Pour the filling into the crust. Return to the oven and continue baking 15–20 minutes, or until the filling is set.
Transfer to a wire rack and let cool completely. Whip the cream, confectioner’s sugar, and vanilla until soft peaks form Spread over the cooled pie. Thinly slice the reserved lime and use to garnish the pie. Remove the sides of the pan, slice, and serve.