1Heat oil in heavy large nonreactive pot over medium-high heat. Add onions and carrots; sauté until onions are golden brown, about 10 minutes. Add garlic and stir 1 minute. Mix in cumin; stir 30 seconds. Add 10 cups broth and barley; bring to boil. Reduce heat; partially cover and simmer 25 minutes. Stir in tomatoes with juice and lentils; cover and simmer until barley and lentils are tender, about 30 minutes.
2Add chard to soup; cover and simmer until chard is tender, about 5 minutes. Stir in dill. Season soup with salt and pepper. Thin with more broth, if desired.