5 TBS butter, melted
1-1/2 cup graham cracker crumbs
1can (14-ounce) sweetened condensed milk
1/2 cup Key lime juice
2 tsp grated lime zest
2 egg yolks
2 eggs, separated, use only whites of 2 eggs
1/4 tsp cream of tartar
1/4 cup sugar
Preheat the oven to 350 degrees.
For the crust, combine ingredients and pat down into a 9-inch pie pan. Bake for 5 to 10 minutes.
In a medium bowl, combine the condensed milk, lime juice, and 1 teaspoon zest; blend in the egg yolks. Pour the filling into the crust.
For the meringue, beat the egg whites with the cream of tartar until soft peaks form. Gradually beat in the sugar and remaining teaspoon zest until the mixture is stiff. Spread the meringue over the filling; spread it to touch the edge of the crust all around. Bake for 12 to 15 minutes, or until the meringue is golden brown.