- Place shallots, garlic and chilli in the Thermomix bowl, chop on speed 5 seconds on speed 7. 
- Now add the celery and chop on speed 5-7 for 10 seconds. Add in the olive oil and cook on speed 1.5 on 110C/230F for 5 minutes. 
- Add in the carrots, capsicum (red peppers) and chop on speed 7 for 10 seconds. Add in the water, vegetable stock paste or cube and can of diced tomatoes. 
- Add in the salt, chilli flakes, crushed black peppercorns and herbs. Cook on 110C/230F on speed 2 for 15 minutes. 
- Add sugar, mix well and cook for 5 minutes on 120C/250F on speed 2. 
- Now blend the sauce on speed 4-8 for 45 seconds. 
- Pour it a bowl and let it cool. Store it in a sterilised glass bottle keep it in a refrigerator for 1 week or in freezer up to 3 weeks. 
- Use it for pasta, pizza or meatballs.