If you layer the lasagna in an oven-safe dish that also fits in your instant pot, you can cook the lasagna in the Instant Pot, even from frozen! Place a trivet inside the Instant Pot and add 1 cup of water. Place the lasagna, covered with foil, on the trivet. Cook for 22 minutes on High Pressure. Carefully remove the lasagna from the Instant Pot, remove the foil, and pop the lasagna under the broiler, provided your pan is broiler-safe, for a few minutes to brown the cheese.