Celeriac & apple purée

Celeriac is the root of a celery plant, but whereas some celery varieties are grown for the stalk, the celeriac ones are grown for the root. Some might not know what to do with this bearded cannonball, but it is no different to setting about a swede and, once the obstinate skin has been cut away, the flesh is there to offer up its extraordinary taste. I find it genuinely hard to describe raw celeriac; let’s just say that celeriac has its own special tang. When cooked, it takes on a differen