About this recipe:There are a hundred different ways to cook chicken curry, but Bengalis (from the eastern part of India) make something called Kosha (or kawshaa) which is very good with either rice or any kind of flat bread. This recipe is called moorgi kosha (or chicken kosha), but my friend Jennie calls it Chicken Chicken Curry!
Heat the oil in a wok or casserole over high heat. Add 1/3 of the onion, sprinkle a little salt and fry for a few minutes, or until golden brown and crispy. Remove from oil and set aside on kitchen paper.
Add the bay leaf and the rest of the onions to the oil. Season with a little salt, and fry until golden brown. Add a spoonful of water and stir so that the onions break down – the water should turn a caramel colour. Add the turmeric, chilli, paprika, ginger and garlic; stir well. Reduce heat to medium high. When the fat leaves the sides, add a spoonful of water, and stir again.
Add the chicken and the sliced tomato. Season with salt and sugar; stir. Add the cardamom, cloves, cinnamon, ghee and a spoonful of water. Reduce heat to low, cover and simmer for 30 or 35 minutes.
Remove the lid, if there is water left in the pan, raise the heat to medium. Add the ground coriander and cook until all the water has evaporated (or you can leave as much sauce as you like).
Spoon onto serving plates and sprinkle with fresh coriander and the reserved fried onions. Serve with naan or basmati rice.