This soup turns a short list of ingredients into a delicious meal. Instead of only boiling the cauliflower and broccoli to cook it, here, the florets are seared until deeply browned on one side while remaining bright green on the other. This gives the soup a layer of caramelized flavor while also preserving the fresh flavor. Infusing olive oil with fresh herbs is a trick you’ll want to keep up your sleeve: The results are delicious brushed on roast chicken, drizzled over roasted winter vegetables or even just sopped up with a nice piece of bread.