In a large pot, bring broth to a boil. Add lentils, tomatoes, garlic, and onions. Partially cover pan and simmer 45 minutes or until lentils are tender. Put soup in blender. Return to pot and season with cumin, salt, and pepper.
In a large pot, bring broth to a boil. Add lentils, tomatoes, garlic, and onions. Partially cover pan and simmer 45 minutes or until lentils are tender. Put soup in blender. Return to pot and season with cumin, salt, and pepper.