I was wandering around Waitrose the other night, just popped in to find some 'butter milk' (see previous cake entry!) and I discovered these...
Prepared potatoes - garlic and rosemary with potatoes and red onions.
They come in a foil packet, there is enough for two, and you just peel the top off and pop in the oven for about 45 minutes. They also sell Mediterranean roast vegetables (really nice) and a few other varieties.
Just perfect when you've been at work all day and really don't fancy faffing about peeling potatoes and veg etc.
Even better, they are 2 for £3!