Turn on the Instant Pot and select sauté.
Add olive oil, onions, garlic and sauté for 3 minutes.
Add the remaining ingredient (Except the zucchini, beans and pasta)
Close the lid and cook on high pressure for 3 minutes.
When cooking cycle ends, do a quick pressure release.
Open the lid and add zucchini, beans and pasta.
Press sauté and let it sauté for 6 minutes while stirring.
Stir in parsley, balsamic vinegar and mix well.
Add more water if you want the soup the be thinner
Serve hot and garnish with Parmesan cheese.