Step 1: In your instant pot, sauté the butter, onion, celery stalk, carrots and mushrooms for 5 minutes until softened and edges start to brown.
Step 2: Add the chopped tomatoes and cook for another 2 minutes.
Step 3: Add the wine and simmer until reduced by half.
Step 4: Add the remaining ingredients and secure cover to instant pot, make sure the vent in is in seal position and press the soup/stew button.
Step 5: Let the instant pot run its course and when done, turn the air valve in the venting position, allowing the steam to escape.
Step 6: Once venting has run its course, remove the lid, stir and taste the soup and adjust seasoning if needed.
Step 7: Enjoy!
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