Meanwhile, heat remaining dressing in large saucepan on medium heat. Add onions; cook and stir 4 min. or until tender. Add ginger and cumin; cook and stir 1 min. Add broth, water, carrots and lentils; stir. Bring to boil; simmer on medium-low heat 25 min. or until lentils are very tender, stirring occasionally. Remove from heat.