Get your butcher to saw up some "Flintstone"-like beef bones to a size that will fit a large roasting pan.
1 Dice celery, onions and carrots and make a bed of these in the bottom of the pan. You could add a head of garlic.
2 Add some diced beef (any cheap cut will work, such as shin, chuck or flank).
3 Add the bones and splash a bit of oil over them, the meat and veges.
4 Roast in a gentle oven (150C) until the contents have coloured. This should take at least a couple of hours. Move the pan's contents around every so often to achieve even browning. It is vital that any burned bits are removed during this time as any charred flavours will contaminate the later result.