Chickpea curry

Name: Chickpea curry
Cook time: 35 min
Total time: 35 min
Cuisine: Asian, Indian
Ingredients: 2 medium onions; 1 x 400 g tin chickpeas; 1-2 fresh green chillies; 2 tablespoons sunflower oil; 1 teaspoon mustard seeds; ½ teaspoon asafoetida; 1-2 teaspoon sugar optional; ½ x 400 g tin of tomatoes; 1 teaspoon fresh ginger paste; 1 teaspoon garlic paste; 1 teaspoon green chilli paste; 1 teaspoon red chilli powder; 1 teaspoon turmeric; 1 teaspoon dhana jeera powder; 1-2 teaspoon sugar optional; a few sprigs of fresh coriander; ½ teaspoon garam masala