If you don't want to buy desert, this is what I often make -
http://allrecipes.com/recipe/key-lime-pie-i/detail.aspx
I buy the graham cracker crust. You can also buy the lemon & lime juice (I never find key limes, do half lime juice, half lemon juice) - although, I use fresh squeezed b/c I think it does make a difference. It's a really easy pie to make and everyone I've served it to LOVES it. In fact, our friends & relatives regularly request it (even the food snobs). It's super easy b/c you can make it way ahead and just have it in the freezer.