When I was in prague last year I had some wonderful afghan food - and I've wanted some ever since.
Is there anything in London?
There is a Persian/Afghan restaurant in Westbourne Park/Paddington on the Harrow Road. Have never tried it though.
If any of those places make Afghan ice cream (the kind I've had was pistachio/rosewater/cardamom/vanilla, which I think is the national flavor, as saffron/rosewater is for Persian ice cream)--go for it!