Even after however many shopping missions, especially around various outposts of the world's politest supermarket, Mrs M can still get me searching for items that I've never had to find before - this week's challenge was a particular brand of Gazpacho, which for once the aisles let me down. She'd also clarified what products I should try and hunt down marked with yellow labels, in this case mainly fruit (but not avocado), for which I had a little more success. Not for the first time every shop can prove to be a school day in so many ways...