Heat oil in a large saucepan over medium heat. Add onion, carrot, celery and garlic. Cook, stirring occasionally, for 5 minutes or until softened. Add tomato paste. Stir to coat. Add lentils, tomatoes, stock, cabbage and 2 cups cold water. Cover. Simmer for 40 minutes or until cabbage is tender. Season with salt and pepper.

Divide soup between bowls. Top with olive oil and parmesan. Serve with bread.