NOTE: I could not get Key Limes, so I used regular Limes for the garnish. But, I used the Key Lime Juice - Nellie and Joe's Key Lime Juice - for the cheesecake. Nellie and Joe's is the closest thing to fresh squeezed Key Lime juice you can get without squeezing it yourself. If you're not familiar with Key Limes, they are smaller than regular limes, not as green, and have a smoother, much less acidic flavor than regular limes do. You can't just use regular limes for a Key Lime pie, or dessert, you will not get the same flavor. You should be able to find Nellie and Joe's Key Lime Juice on the baking isle of most grocery stores. If you can't find it in a local store, you can purchase it online. Once you open it, it must be kept refrigerated, which means, you can use it again and again, and make any Key Lime recipe you choose.