Stir in the sliced garlic, red pepper flakes, and Chad doesn’t usually like lighter soups, especially vegetarian, but went back for seconds. It was a surprise hit! While searching for a way to use rainbow swiss chard from my CSA box, I came across this Mushroom Chard Soup recipe. But if you can’t find rainbow chard, feel free to substitute green chard, collards, spinach, or kale. 1 medium onion, finely chopped 1 tablespoon extra-virgin olive oil (evoo) 6 large chard leaves, stalks separated (leaves should be cut in 1- to 3-inch pieces, stalks sliced to 1/4- … Some local stores and websites carry salt-free sun-dried tomato powder. The idea for this soup came from a famous Scottish recipe called Cock-a-Leekie Soup traditionally served for special occasions. You can buy Organic Rainbow Chard already prepared from Cut ‘N Clean Greens. Ingredients. It comes washed, cut (hence the name) and ready for whatever recipe you choose to use it in making life so much easier! Heat the olive oil in a large skillet or pot over medium heat. With the bright-orange sweet potatoes, white beans, and rainbow-colored chard, this is a very pretty soup.