The soup, reheated after an overnight stay in the fridge, turned out very much better than I’d hoped for, though with not a great deal of potato flavour. The leek flavour came through very well though, so ignore my suggestion to double the quantity.
It’s been suggested that Aunt Bessie’s frozen mash (HT to hugosmum70), might be better than Smash. Probably would, too, so I intend to try that. If you want to try it, start with 300g and see how you get on. Just remember you can add more but you can’t take it out.
In addition, instead of the grated carrot I suggested, a handful of Aunt Bessie’s frozen carrot and swede mash would be good – no idea why I didn’t think of that, as I often use it for soup and always have some in the freezer.
Oh well, no-one’s perfect, not even me. 😉