I had something like this at a fantastic Japanese restaurant in Soho called Koya. Pink soba noodles are flavoured with plums and you can also buy them in green (green tea-flavoured), black or white. They cook very quickly and have no gluten (though you should check the label, as some soba noodles contain wheat). In this recipe, you eat them cold – sounds weird, huh? Actually it works: the hot beans, cold noodles, salty fudgy taste of nuts and miso, and vinegary heat of ginger.
Soba noodles are the healthiest fast food, ready in minutes. If you are a bit dubious about the cold noodle thing, or unable to get hold of soba noodles, you could of course use any soft noodles for this, like rice or wheat (udon) noodles, which you can often buy ready-cooked, just necessitating a bit of heating up.
The pickled ginger can be bought in Asian shops or online. Here I’m talking about the dark pink shredded stuff rather than the salmon-pink slivers we find in sushi bars.