Freezing lime bars is an excellent way to save them for later. You can freeze leftovers or freeze an entire batch of bars. After baking and cooling, cut them into squares, place them in an airtight container without touching and freeze. You may want to use parchment paper to layer them in the container as well. To thaw, take out as many bars as you'd like and put them in the refrigerator or on the counter. You can eat them cold or at room temperature.