1. Mix the coriander, mint, garlic and red chilli in a food processor or blender and pulse to a fine paste.
2. Add the lime juice to taste, and a little water if needed.
3. Stir into the yoghurt and add the sugar and salt to taste.
Anjali’s Tip: It’s easy to roast garlic cloves. Just pop them whole, in their skins, in a moderate preheated oven drizzled with olive oil for around 10 minutes.