I wanted a quick and easy pie that would mimic the flavor of Key Lime Pie but without the fuss. I tried a popular on-line recipe but found that without a gelling ingredient, the pie was messy to serve and the slices ran together. To solve the problem, I added Instant Pudding Mix and was very pleasantly surprised with the result. Note: use a LARGE graham cracker crust (deep dish type). If your store only carries the small prepared graham crusts, use two crusts.