Nigel Slater winter roots and lemon roast recipe on Nigel Slater’s New Year Suppers

Nigel Slater serves up winter roots and lemon roast on Nigel Slater’s New Year Suppers.

The ingredients are: 750g Jerusalem artichokes, 250g small potatoes, good glug of olive oil, 2 lemons, salt and ground black pepper, 2 large handfuls of fresh flatleaf parsley and small lump of parmesan.