Mummy's whole fish
1 Rub the fish with the juice of one lemon, salt, chilli powder and turmeric. Place on a plate, cover loosely and set aside until ready to cook. Preheat the oven to 180C/Gas Mark 4.
2 Heat the oil in a frying pan over a medium heat. When hot, add the cumin seeds and allow to splutter for 30 seconds. Add the garlic and cook for a few seconds; do not allow to burn. Add the onions and cook for 10 minutes, or until slightly caramelised.
3 Add the ajwain seeds and chopped tomatoes and cook for 5-6 minutes, or until the tomatoes are soft and the oil rises to the top. Add the tomato purée and cook for a further 3-4 minutes until everything is red and bubbly. Turn off the heat.
4 Top the fish with this tomato mixture, then place the fish in a large baking dish, cover with foil and cook in the hot oven for 45 minutes if the fish is whole, 15-20 minutes if the fish is in pieces. Check to see if the fish is cooked through. For the last 4-5 minutes remove the foil and allow the topping to caramelise.
5 Garnish with chopped coriander, green chilli, ginger julienne and a squeeze of half a lemon and serve hot.
• Summers Under the Tamarind Tree by Sumayya Usmani is published by Frances Lincoln, £20