Gujarati undhiyo

INGREDIENTS

• 2.5cm/1in piece ginger
• 3 large garlic
• 2 small green chillies, seeds
• 1 tbsp lemon juice
• 3 tbsp chopped fresh coriander
• 1 tbsp ground coriander
• 1 tsp ground cumin
• ¾ tsp carom seeds
• 85g/3oz freshly grated coconut
• 1½ tsp salt
• 1 tbsp sugar
• 2 tbsp ground roasted peanuts
• 5 tbsp vegetable oil
• pinch asafoetida
• 1 tsp mustard seeds
• 1 potato
• 4 small aubergines
• 1 sweet potato
• 1 parsnip
• 200ml/7fl oz water
• 2 handfuls frozen tuvar beans (available from Asian supermarkets), or broad beans