How do you freeze slices of lasagna?

To freeze individual slices of cold cooked or unbaked lasagna, cut the lasagna into equal pieces. First, cut down the middle of the lasagna, to make two equal halves. Then, cut crosswise, making 4 to 8 equal pieces (the total will depend on how large the lasagna is and how wide you prefer the pieces to be). Wrap each slice in microwave-safe plastic wrap if you intend on using the microwave. Otherwise, wrap each piece in kitchen foil or place into an airtight container suitable for freezing. If you’ve wrapped the pieces in plastic, arrange inside a large resealable freezer bag to keep them in one place for storage.