Set Instant Pot to saute mode. Add 1 Tbsp. olive oil to the pot. When hot, add 1 lb. ground beef.
Cook until it just begins to brown, then add in garlic powder, Italian seasoning, 1 small chopped onion and 2 Tbsp. minced garlic. Cook about 3 minutes until onions are translucent and beef is browned.
Add in 1 jar marinara sauce and stir until fully mixed. Then, pour the mixture into a separate bowl and clean out the inside of your Instant Pot.
How to Make Bechamel
Melt 2 Tbsp. butter in a pan over low heat. Sprinkle in 2 Tbsp. flour. Cook until the mixture just begins to brown, then slowly pour in 2 cups milk while whisking. Continue cooking until the sauce thickens. Finish it with salt.For more detailed instructions, follow this guide:How to Make Bechamel Sauce.
Line your springform pan or round baking dish with parchment paper. Add an even layer of meat sauce.
Add a layer of oven-ready lasagna noodles, breaking up as necessary to cover the meat sauce.
Top with another layer of meat sauce. Spread ⅓ of your bechamel sauce over the meat sauce.
Top with a handful of mozzarella cheese and a sprinkle of Parmesan.
Place another layer of noodles over the cheese.Repeat the layers by starting again with the meat sauce. Layer in this order: meat, bechamel, shredded cheese, lasagna noodles. On the final layer, top with noodles, then your remaining bechamel sauce and shredded cheese.
Cover the lasagna tightly in foil. Create a sling by folding a long sheet of foil into a rectangular strip. Use this strip as a "handle" to lift the pan in and out of the Instant Pot.
Add 1 cup of water to your Instant Pot. Place the trivet in the pot, then add the covered lasagna with the sling underneath.
Cook on high pressure for 20 minutes. Quick release, then serve and enjoy!
You can brown the top of your lasagna by placing it under the oven broiler for 1-2 minutes.