Small handful fresh coriander, roughly chopped Plain yoghurt (optional) For the Sauce: 1 medium sized garlic clove, peeled 4cm fresh ginger, peeled 1/2 onion roughly chopped 1 tin tomato, or 4-5 ripe fresh tomatoes, quartered 2 hot green chillies 1 tsp salt 1/2 tsp coriander seeds 1/2...