These lasagna roll ups will stay good in the refrigerator for about five days, so make sure to portion them out into air-tight containers after cooking for quick grab-and-reheat meals for the rest of the week. After the portions are chilled in the refrigerator you can transfer some to the freezer for longer storage (up to three months).
To reheat the frozen lasagna roll ups, either let them thaw in the refrigerator over night before reheating in the microwave, or go straight from the freezer to the microwave, making sure to use the defrost function first.
Egg: Egg helps bind the cheese filling and keeps the filling moist and rich. I have, on occasion, forgotten the egg and the lasagna roll ups still turned out quite delicious, just not as moist.