Mix the sherry, soy sauce, cornflour, sugar and beef. Stir-fry and brown it all in a wok or large frying pan; remove from the pan and pour off any fat that remains.
Return the pan to the heat, add the vegetable oil and quickly sauté the garlic, ginger and onions, then when it is softened, sprinkle in the curry powder and spice. Cook a minute or two, then return