Serves 6 to 8 3 to 31/ 2 pounds pumpkin 6 tablespoons olive oil 2 onions, chopped 3 garlic cloves, chopped 1 3- inch piece of fresh ginger root, grated 1 teaspoon ground coriander 1/ 2 teaspoon ground turmeric Pinch of cayenne pepper 4 cups vegetable stock Salt and ground black pepper 1 tablespoon sesame seeds Fresh cilantro leaves, to garnish