I'll throw in the excellent 5 ingredients 10 minutes http://5ingredients10minutes.com/ from Jules Clancy, most of the recipes can be found for free on her blog at thestonesoup.com 10 minutes required a bit of training, but it's almost always easily cheaper, faster and better than random food for order.

There's really no need to spend 4-7 hours a week prepping food if all you want is a decent and healthy dinner - though spending time preparing something fancy for friends and family is a rewarding activity in it's own right, but that's an entirely different matter.