1 x 2 kg (4 lb) ham, preferably with bone 1 litre (1.75 pints) draught Guinness 1 vegetable stock cube 1 onion, unpeeled and quartered 12 black peppercorns 2 bay leaves 1 tablespoon demerara sugar 2 tablespoons dark brown sugar Celeriac Salad 1 celeriac, about 500g (1lb) 2 tablespoons lemon juice 2 large green apples 8 tablespoons mayonnaise 2 tablespoons white wine vinegar 2 heaped teaspoons Dijon mustard 2 tablespoons chopped parsley Salt and pepper