The bit I used was 750g and cost just £3. That's basically vegetable prices. And it'll keep a hungry carnivore happy for a good few days!
Put the meat in cold water and bring to the boil. Keep it boiling for 25 mins per 500g + 20 minutes extra.
Eat warm or leave to cool. If you want a sauce, fry up some mushrooms in plenty of butter, add a tablespoon of flour - stir to thicken - then add some milk and keep stirring until the sauce thickens.