Keeping with my quest to omit the oil when preparing these recipes, I left out the one tablespoon olive oil listed for sautéing the onion. Instead, I sautéed the onions in a dry cast iron soup pot until they started to brown, then added a little water to bring up the browning. This was the only adjustment I needed to make to this recipe to maintain my goal of "no oil" and "all whole grain". Unfortunately, the market where I shopped had no fresh chard available, so I substituted spinach instead. This worked very well. I just stirred a bag of baby spinach into the soup once it was done, turned off the heat, and let everything sit for about an hour.
Most soup recipes call for garlic to be added at the beginning of the cooking time, as this one did, but I almost always hold off adding it until the soup is completely cooked. At that point, I stir the garlic into the finished soup, just after turning off the heat, as this cooks the garlic just enough to take the edge off, but not so much that the flavor becomes lost in the pot. I followed this procedure for this recipe and also added about ¼ cup chopped cilantro at the same time (my addition). A great soup! I'm already looking forward to the leftovers.