Turn on the Sauté button on your Instant Pot and add the oil or vegan butter. When heated, add the onions and sauté for 2-3 minutes until slightly translucent.
Now add the minced garlic and the seasoning. Sauté for 1 minute to lightly brown the garlic. Add the diced mushrooms and sauté for another 3-4 minutes until they get tender and release water. Add wine and let it sizzle.
Add the Arborio rice and stir for couple minutes to coat it well.
Stir in the broth, salt, and pepper. Mix well. Close and secure the lid. Turn the steam release handle to the SEALING position. Cancel the Sauté function and select RICE button. Takes about 15 minutes to cook the rice after building pressure.
When Instant Pot is done cooking, wait for 10 minutes on KEEP WARM setting and then release all leftover pressure. Once the Float Valve goes down you can carefully open the lid.
Now stir in nutritional yeast or vegan parmesan cheese. Taste for seasoning and add more if needed.
Sprinkle with your favorite toppings like fresh or dry herbs, crushed red pepper flakes, squeeze of lemon, vegan cheese or fresh ground black pepper. Drizzle truffle oil if using. Serve immediately.