1.Combine ½ cup stock, onion, ginger and garlic in a medium saucepan; bring to the boil. Reduce heat to medium; cook, stirring occasionally, for 5 minutes or until onion softens.
2.Add curry paste; cook, stirring, for 30 seconds or until fragrant. Reduce heat to low, add carrot; cook, stirring, for 5 minutes. Add remaining stock and the water; bring to the boil. Reduce heat; simmer, covered, for 10 minutes.
3.Add chickpeas and beans to pan; simmer, covered, for 5 minutes or until beans are tender. Stir in half the coriander. Stand soup for 10 minutes.
4.Meanwhile, microwave pappadums according to packet directions.
5.Blend or process soup until smooth. Serve topped with remaining coriander leaves; accompany with yoghurt and pappadums.
Reheat the soup, covered, in a microwave oven on HIGH (100%) for about 1½ minutes, stirring halfway through the heating time. Make the soup ahead of time and freeze it in two batches. Or, be really organised and double the recipe so you have portions on hand for later fast days. Simply defrost the soup in the refrigerator the day before your fast day.