Vegetarian recipe ideas
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Heat the oven to 160C/fan 140C/gas 3. Put the peppercorns and onions in the bottom of a large roasting tin. Pour in about 2cm water. Sit the gammon on a trivet in the tray then cover the whole thing tightly with a double layer of foil. Bake in the oven for 20 minutes per 500g (so 2 hours for a 3kg joint).
While the gammon cooks make the potato salad. Boil the potatoes in salted water until tender then drain and cool. Mix all the other ingredients, then season and toss with the cooled spuds.
Remove the gammon and turn the oven up to 220C/fan 200C/gas 7.