ASDA part of the Wal-Mart family

• 4tbsp olive oil
• 1 medium onion
• 150g carrots
• 150g celeriac
• 150g swede
• 1tbsp chopped fresh lemon thyme
• 3tbsp rice or cider vinegar
• 700g jar Asda passata
• vegetable sticks
• pitta bread

1 Peel and roughly chop the vegetables. Heat the oil in a large pan, add the veg and thyme and stir until coated. Turn the heat down and sweat for 20 minutes until soft and sweet, stirring regularly.

2 Add the vinegar and reduce over a low heat for 2 minutes. Pour in the passata and simmer for about 5 minutes.

3 Leave to cool, then whizz in a blender or liquidiser until smooth. Serve with veg sticks and pitta bread for dipping. Store the rest of the ketchup in the freezer.