In a stand mixer, combine together ground beef, italian sausage, almond flour, basil, oregano, garlic, salt, pepper, parmesan, eggs and water. Mix until combined.
Using a large cookie or ice cream scoop, scoop meat mixture into balls. Press a piece of mozzarella into the middle of each ball and close the meat around the cheese. Repeat the process until all meatballs are prepared.
In a small bowl, combine the crush tomatoes, garlic, basil, and oregano.
Add the olive oil to the Instant Pot. Add one cup of the tomato sauce.
Place raw meatballs over the tomato sauce, stacking once the bottom is covered. Top with remaining tomato sauce.
Put the lid on the pressure cooker and set the valve to sealing. Press “manual” or “pressure cook” and set time for 7 minutes on high pressure. When the cook time ends, let the pressure release naturally for 5 minutes, then turn valve to venting to quick release the remaining pressure.
Serve topped with grated parmesan cheese.