With cold weather approaching, it’s time for big bowls of soup. Way back in March, when it was chilly out, I had a huge amount of kale and some potatoes from the Greenmarket, and I got the idea to make caldo verde. Caldo verde is a traditional Portuguese kale soup I’ve seen Emeril Lagasse make on tv many times. But could it be made vegetarian? Looking at his recipe online, I was surprised to see that with one exception, which I will get to later, the dish actually was completely vegetarian — he calls for the use of water instead of broth. I knew then that it was possible.