Tradition

 Here's a picture of my dear friend Cyndi, who brought the Wedding Key Lime Pie. I have a very long history of showing up at her house (and, well, many other houses) with key lime pies from Klinger's, so this seemed like a natural fit. We just treated it like a normal Wedding Cake and used it for the ceremonial cutting.

I'm so convinced of the brilliance of this option that I'm going to have Key Lime Pies at all my future weddings.