Choose the sauté function on the Instant Pot. While that is heating up, dice your onions,mince your garlic, and break each lasagna noodle into thirds. Set the noodles aside.
Once the Instant Pot is hot on saute mode, add the olive oil. Allow that to heat up. Once the oil is hot, add the ground meat. Break up the meat and brown. This should take about 5 minutes
While the meat is cooking, in a bowl, pour in the marinara sauce, the dried Italian seasoning, red pepper flakes, salt, and black pepper.
Once the meat is browned, add the onion and garlic. Stirring occasionally, allow the garlic and onions to cook and soften.
Once the garlic and onion is cooked, add in the tomato paste. Stir this well in the meat mixture. The paste should darken.
Pour in your marinara sauce (with the seasonings) over the meat.
Add 2 cups of water.
Stir and make sure to scrape the bottom of the pot from any leftover meat that may have browned.
Taking your noodles that you have broken up into thirds, layer them on the meat mixture, under the water from different directions. This way each noodle will be well distributed for eating, but also,they will cook thoroughly. Once each noodle is in the pot, using your spoon,push down on the noodles enough to submerge under the water.
Pour in your remaining 1 cup of water. Stir gently to incorporate everything in your pot.