Add mushrooms and onions to mixture and ladle into a large ceramic or glass pot or casserole dish with a lid, layering on sprigs of rosemary and thyme. Add lid, place pan into oven, and bake 1 hour.
This easy minestrone from the Vegan Richa’s Instant Pot Cookbook is endlessly adaptable by adding your favorite beans, pasta, vegetables, and variations of herbs, such as rosemary and thyme.