I do a sweet potato and aubergine (egg plant to you guys I guess!) curry with spinach in.
cube a large (or 2) sweet potato, cut aubergine to similar size.
Fry chopped onion, garlic and ginger until soft.
Add 1/2 tsp turmeric, 1 tsp garam masala, 1 tsp (well I like it spicy!) cayenne pepper. 1/2 tsp cumin, 1/2 tsp ground coriander
Cook that a few minutes, then add the potatoes, aubergine and 2 tins of chopped tomatoes.
Let that cook on a medium heat for about 25 minutes until the potato is cooked.
Add a couple of handfuls of spinach and 2 chopped green chillis. Cook until the spinach has wilted down.
Serve with some rice.
Also have a recipe for a low fat lasagne, using chicken, campbells condensed low fat mushroom soup for the sauce and add spinach in to the sauce as well. It is delicious.