How do I properly cook frozen lasagna in the oven?

To properly cook frozen lasagna in the oven, preheat the oven to the temperature specified on the packaging. Remove the lasagna from the packaging and cover it with aluminum foil. Place the covered lasagna in the oven and bake for the recommended time. Remove the foil during the last 10-15 minutes of cooking to allow the top to brown. Let it rest for a few minutes before serving.