Directions
Place the pork steaks in the bottom of the Instant Pot.
Pour in the beef broth and apple cider vinegar.
Add 1 teaspoon (5 ml / 0.2 fl oz) of salt, whole peppercorns, bay leaves, thyme sprig, chopped onion, celery stalk, and celery leaves.
Secure the lid, set the steam release handle to the 'Sealing' position, and select the 'Meat' or 'Pressure Cook' setting.
Cook on high pressure for 15 minutes.
Once the cooking cycle is complete, perform a quick pressure release by carefully moving the handle to the 'Venting' position.
When the pin drops, open the lid. Carefully remove the pork steaks and set them aside.
Strain the broth, reserving the cooked onions and discarding the other solids.
Select the 'Sauté' function on the Instant Pot.
Add the butter to the inner pot.
Once melted, add the reserved cooked onions and the sliced mushrooms.
Sauté for 5-6 minutes until the mushrooms are softened and browned.
Season with the remaining 1 teaspoon (5 ml / 0.2 fl oz) of salt.
Stir in the heavy cream, cottage cheese, crumbled feta, and grated Parmesan.
Continue to stir until the cheeses are melted and the sauce is smooth and slightly thickened.
Turn off the 'Sauté' function.
To serve, place the warm pork steaks on a plate and generously spoon the creamy mushroom sauce over the top.