Chop up the onion.
Put your Instant Pot on "Saute". Let it heat up for a few minutes and then add your onions. Stir for a few minutes until the onions become soft and translucent.
Add broccoli and stir for a few minutes.
Add chicken broth.
Put the top of your Instant Pot on, close and secure the lid, and set to "sealing" NOT "venting".
Set the Instant Pot for 3 minutes on manual high pressure.
When the soup is done, release the pressure - remember to be careful of the steam. Transfer the soup to a blender or food processor to puree. Be careful, it will be hot. Use an oven mitt to clamp down the top of the blender.
Add soup back to Instant Pot, add 1 cup of DairyPure Lactose Free Reduced Fat Milk.
If you do not have an Instant Pot, make it basically the same way, just in a stockpot. Puree the soup and add the DairyPure Lactose Free Milk at the end.