When I made this recipe, I ran out of tortillas before I ran out of filling, so I froze the rest of the filling for later use inside quesadillas or on top of nachos. If you are freezing half the batch, cover the assembled enchiladas well with foil and plastic wrap. A disposable square aluminum cake pan works great, and after covering it with foil it slides easily into a 1 gallon ziploc freezer bag. Label and freeze! When you are ready to use them, thaw as much as possible (overnight in the fridge is best). Cook covered for 25-35 minutes, then uncover and cook 20-30 minutes more or until browned and bubbly.