Brown the meat and saute the onions. Turn the Instant Pot to saute. Add a teaspoon of olive oil and the ground beef. Add 1 teaspoon of Italian seasoning, garlic, salt, and diced onion. Saute for 3-5 minutes or until meat is no longer pink. Remove the cooked meat from the pressure cooker using a slotted spoon and turn the Instant Pot off.
Prep the ricotta cheese and marinara sauce. In a medium bowl, mix together the ricotta cheese, egg, 1 teaspoon of Italian seasoning, garlic powder, and parmesan cheese. In a separate bowl, mix together the marinara sauce, the rest of the Italian seasoning, and parsley.
Layer the lasagna. In a 7'' springform pan, start layering the lasagna with a layer of marinara sauce. Break up some of the lasagna noodles and place on top of the sauce. Spread half the ricotta cheese mixture on the noodles. Add half the meat mixture. Cover the meat mixture with marinara sauce and then add a layer of mozzarella cheese. Repeat layers to the top of the pan. Cover the springform pan with tin foil.
Prep the instant pot. Add 1 cup of water to the Instant Pot. Place the trivet in the Instant Pot. Prep a piece of tin foil to act as a "sling" to help lower and lift the lasagna into and out of the instant pot. Use this to lower the lasagna onto the trivet in the instant pot. Place the lid on the pressure cooker.
Cook. Set the instant pot to high pressure for 22 minutes. Let the pressure naturally release for 15 minutes and then do a quick release for any remaining pressure. Remove the lasagna from the Instant Pot and let rest for an additional 10 minutes before serving.