Here are a few tips for making the perfect skillet lasagna. – How to Store & Reheat Leftovers - Transfer any leftover skillet lasagna to an airtight container and refrigerator for 3 to 4 days. Reheat it in the microwave until it’s warmed through, or transfer it to an oven-safe dish and bake it in a 350ºF oven until it’s warm and bubbly. – Can a Skillet Lasagna Be Frozen? - Yes, you can freeze this recipe. Transfer the cooked lasagna to an airtight container and freeze for up to 3 months. Let it thaw in the refrigerator overnight before reheating in the microwave or a 350ºF oven.