This cabbage soup is the kind of comfort food I prefer: tasty, greedy and rich in vitamins! Preparing this recipe I’ve been inspired by the classic French soup. Shiitake mushrooms give a particular flavor to this cabbage soup. The secret of this recipe is the onion, very smooth and caramelized. I stir fried the vegetables with clarified butter, but it’s possible use a mix of butter and extra virgin olive oil as well.