Heat oil and add mustard and cumin seeds fry until mustard seeds begin to pop Add onion and cook until soft Add chillies garlic and ginger and cook for 30 seconds more
stir in the coriander mix and add the squash and aubergine Reduce heat to low and stir for 1 minute
Add 400ml cold water cover and simmer for 15 minutes
Add cauliflower and tomatoes; cover again and simmer for a further 10 minutes
Serve with rice naan or chapatis and sprinkled with fresh coriander if desired