1. In a large pot fry the oil and onion for 5 minutes, then add the spices, squash and beans.
2. Stir well then add the chopped tomatoes. 200ml water and simmer for 30 mins.
3.Preheat the oven to 180 C. Stir in the coriander to the beans.
4.Grab the tortillas and fill them with the bean and squash mix (leaving some extra sauce for pouring over).
5.Place in a roasting tray, the extra sauce can be poured over them.
6.Bake for 15 minutes then top with avocado and yogurt.