Place the olive oil in your Instant Pot and select “sauté” setting. Once the oil is hot, add your meatballs and sear until browned all over, stirring as needed.
Add the chopped vegetables and cook until the onion is translucent. Then add the tomato sauce.
Turn off the IP. Secure the lid and select “meat/stew” setting for 7 minutes (2 if the meatballs are precooked).
Allow to natural release and then serve on sub-style buns with a sprinkle of cheese or parsley.
Notes
Deglaze: After searing your Italian meatballs add a little liquid to the pot and deglaze the bottom of the pot. Use a wooden spoon and scrape away and food particles stuck to the pot. This will prevent a burn notice when cooking your meatball and pepper mixture.