Peel and roughly chop the celeriac knob, add to the boiling water and cook until softened, about 25 minutes. Strain, reserving the cooking liquid. Put the celeriac root in a blender and puree with ...

Celeriac is often served raw in a mustardy sauce ... It won’t cover the vegetables – that’s fine. Bake for 1 hour 15 minutes, or until the vegetables are tender. Cover the top with foil ...