Ooh, I will watch this with interest.
We have curry fairly regularly, and the DC always eat it:
Fry a couple of onions, add ground coriander, ground cumin, garam masala (sometimes curry leaves, curry powder, cumin seeds), then add diced potato (and/or sweet potato) and usually a bag of spinach or a couple of blocks of frozen spinach, a tin of tomatoes, some low salt bouillion and some water. Then add a tin of chickpeas once it has been bubbling for a while. Often I just bung in whatever tired old veg we have lying around. Serve with naans, and rice or cous cous.
Also, we have Quorn spag bol in the slow cooker a lot (think I got the recipe on here):
Chopped onion, packet of Quorn mince, couple of cloves of garlic, basil, two tins tomatoes - give it a stir, then add one last tin of toms over the top. Bubble away for several hours.
Pesto is always a good standby, too. When the DC are whingy and tired and we need something quick and easy. If we're okay for time, I usually fry off an onion or two, mushrooms, maybe some courgette and add that. Sometimes I add a tin of peas for some extra green stuff.