Absolutely. If you cut into lasagna before allowing it to set after baking the oven, you'll be left with a soupy mess. This step is not optional for a good lasagna. Once you pull the lasagna from the oven, let it sit on the counter uncovered for 15 to 20 minutes. Don't worry. The lasagna will still be plenty warm once you cut into it. While the lasagna sits, this is the perfect time to warm up some garlic bread, pour drinks and all that jazz. After the lasagna sets, serve and enjoy this unforgettable meal.