This Instant Pot Spaghetti and Mushrooms is a simple one-pot meal that is ideal for busy weeknights. In the Instant Pot, the spaghetti cooks perfectly, and the mushrooms add a delicious earthy flavor to the dish. Ingredients: Dried Basil Olive Oil Salt Dried Oregano Black Pepper Crushed Tomatoes Spaghetti Mushrooms Grated Parmesan Cheese Onion Instructions: