Heat oil in a medium deep frying pan over medium heat. Add the onion, cook for 3 minutes or until soft. Stir in the spice and cook, stirring, for 1 minute. Add pumpkin and mushrooms and stir until the vegetables are coated with spice mixture.
Add the tomatoes and stock, cover and simmer over medium-low heat, stirring occasionally, for 15 minutes or until the pumpkin is almost tender.
Stir in the chickpeas and dates, cook, covered a further 10 minutes until pumpkin is tender and chickpeas warm. Top with a little yoghurt, scatter over the coriander and serve with couscous.