1. Fry onions in olive oil until soft, add celery and fry 5 more min.
2. Add whole peeled tomatoes carrots, tomato paste and water.
3. Season with salt and pepper, add sugar if tomatoes are too tart.
4. Add sundried tomatoes and simmer for 30mins.
5. Check the taste and adjust to your liking.
6. If the sauce is too thick add a bit of water or simmer a little longer for a thicker sauce.