Aromatic prawn & cashew curry - Good Food Middle East

Ingredients

• 1 onion, chopped
• thumb-sized piece ginger, peeled and roughly chopped
• 4 garlic cloves, peeled
• 2 green chillies, seeds removed
• small bunch coriander, stalks roughly chopped, leaves picked
• 1 tbsp butter or ghee
• 1 tbsp sunflower oil
• 2 tbsp garam masala
• 150g bag unsalted cashews
• 400g can chopped tomatoes
• 400ml chicken stock
• 400g raw king prawns
• 150ml pot natural yogurt
• 50ml double cream
• rice and Indian breads, to serve