This is not an authentic recipe for key lime pie but I think it is even better. Creamy, smooth, not overly sweet, quick & easy....just perfect. Makes two pies if using 9-inch store-bought graham cracker crusts.
With an electric mixer, blend cream cheese, lime juice, and condensed milk until smooth. Add zest and mix just until combined. Pour filling into prepared crust. Chill pie at least 6 hours and up to 1 day. Serve topped with sweetened whipped cream or crÃ¨me fraÃ®che.