Set Instant Pot to saute setting for 7 minutes. Saute the onion, garlic, and celery, adding a bit of water if needed to prevent sticking.
Once the saute is over, add the broccoli and vegetable broth. Put lid on and set to high pressure for 5 minutes.
Do either a quick or natural release. Add the milk, salt and pepper, and use either an immersion blender or a regular blender to carefully puree the soup. Serve with the vegan parm--it's not really optional! It adds saltiness and flavor. You could crumble in saltine crackers or some equivalent, instead.
Stove top instructions
In a large pot on the stove, saute the onion, garlic, and celery for 5-10 minutes, adding a bit of water if needed to prevent sticking.
Add the broccoli and vegetable broth, and cover. Let cook 10-15 minutes, until broccoli is very tender. Add the milk, salt and pepper, and use either an immersion blender or a regular blender to carefully puree the soup.
Serve with the vegan parm--it's not really optional! It adds saltiness and flavor. You could crumble in saltine crackers or some equivalent, instead.