Who doesn't love key lime pie? Tart, but sweet, utterly rich and a most delightful way to end a summer meal. This popsicle version is pretty cool and now that we have tried it, it may be our new favorite way to capture the taste of the Keys and Miami on a stick. Because everything is better on a stick. And the fact that this dessert requires no heat, no oven, no nothing other than zesting, squeezing and stirring makes it that much more of a great way to beat the heat.