Heat the oil in a large frying pan or flameproof casserole pot over a medium heat, and fry the onion for 10 mins until golden and sticky. Add the garlic, ginger, turmeric, ground coriander, garam masala, cumin and tomatoes, and fry for 2 mins more. Add the chickpeas, 100ml water and the sugar and bring to a simmer. Stir in the spinach, then cover and cook for 20-25 mins. Season to taste.

Cook the eggs in a pan of boiling water for 7 mins, then rinse under cold running water to cool. Drain, peel and halve. Swirl the yogurt into the curry, then top with the eggs, chilli and coriander. Season.