brush sliced mushrooms with Dijon mustard
sprinkle the mushrooms with the Provençale blend, or the Italian seasoning
add the wine / vegetable broth to the Instant Pot with the garlic cloves
stir the mushrooms into the wine & garlic mixture
secure Instant Pot lid & set pressure valve to Sealing
cook on Manual / Pressure Cook for 6 minutes
once cooked turn the dial to Venting to Quick Pressure Release
remove lid and stir in the sour cream