This mushroom soup recipe is hearty and delicious, with toasted whole grain farro to add body and rosemary to add earthy aromas. Like any great recipe, there are many ways in which this soup builds flavor. First, by allowing enough time for the vegetables to brown, those caramelized bits can mix into the broth. Then, letting the farro toast in the pan with rosemary and vegetables before simmering adds a nutty undertone to the grains. Add a little white wine to balance and brighten the savory elements and youve got a wonderfully complex mushroom soup, which, by the way, is vegan Shopping tip: buying packages of pre-sliced wild mushrooms certainly cuts down on prep time, but if you dont mind some extra chopping, the uncut kind can be less expensive.