In large saucepan, heat oil over medium heat.Cook celery, carrot, onion and garlic for about 5 minutes or until softened.Add paprika.Stir and add tomatoes.Cook and stir, 5 minutes.Add lentils and stock.
Bring to boil, reduce heat and simmer, uncovered, 10 to 15 minutes or until vegetables are tender.Season to taste with salt and pepper.Top with parsley and cheese.