- Set the Instant Pot to saute.  
- When hot, add oil, mushrooms, onions, and garlic. Saute until onions are translucent.  
- Select cancel on your Instant Pot to stop the saute function.  
- Add the broth, Dijon mustard, paprika and Worcestershire. Ensure there are no onion or mushroom bits stuck to the bottom of the liner.  
- Place the trivet that came with your Instant Pot into the broth. Place the pork loin on the trivet.  
- Place a collapsible petal steamer on top of the pork.  
- Add the quartered potatoes to the steamer rack.  
- Secure the lid and seal the pot. 
- Set the Instant Pot to high pressure for 20 minutes.  
- Quick release the pressure when pressure cycle is done.  
- Lift the steamer rack with the potatoes out of the pot, and place into a large bowl.  
- Using a meat thermometer, check that the pork temperature is at least 145°F. Remove from the liner and cover with foil and let sit for 5-10 minutes.  
- Meanwhile, add the cream and butter to the potatoes and mash to desired consistency. Add cream until desired texture is achieved.  
- Set the Instant Pot to saute and stir in the flour slurry ( 2 tbsp flour and water combined in a small bowl) and heat until thickened. If you want a thicker gravy, mix up a second slurry and add that in.  
- Slice pork and pour gravy over top.