In a 6-qt. stockpot, heat oil over medium heat. Add kielbasa; cook and stir 6-8 minutes or until browned. Remove from pot with a slotted spoon., Add carrots and onion to same pot; cook and stir 6-8 minutes or until tender. Add garlic and cumin; cook 1 minute longer. Stir in kielbasa and remaining ingredients; bring to a boil. Reduce heat; simmer, covered, 35-45 minutes or until lentils and barley are tender, stirring occasionally.