Heat the oils in a work or large
frying pan, add the garlic, ginger and half the spring onion and
cook, stirring regularly, over high heat for 2 minutes.
Add the mince and stir-fry for 3-4
minutes, or until just cooked, breaking up any lumps.
Add the water chestnuts, bamboo
shoots, oyster and soy sauces, sherry, sugar and remaining spring
onion.
Cook for 2-3 minutes, or until the
liquid thickens a little.