Roasted celeriac with peppercorn sauce

This is a rich and delicious meal, with an outrageously good peppercorn sauce that vegetarians so often miss out on. Celeriac has seen a revival over the past year or two, and rightly so – it has a satisfying flavour and bite, only intensified by the curing process. Serve with good-quality chips and a green salad for a wonderful Sunday supper.