It's recommended to consume pasta with porcini mushrooms and sausage immediately. The sauce can be prepared in advance and stored for 1-2 days in the refrigerator.
This porcini ragu is no exception. Of it, she says: "I'm not sure if you're allowed to call a sauce that doesn't contain meat, doesn't start with a soffritto, and that only cooks for 10 minutes a ...
Add the tomato puree and cook out for 30 seconds. Add the wine and bring to the boil. Add the stock, marmite and balsamic and simmer for 15 minutes. Blend to a smooth sauce and check seasoning.