Melt
the butter with the oil in a large frying-pan. When
it is hot, add the cabbage and turn it in the
mixture until thoroughly coated. Reduce the heat to
low, cover and simmer for 5 minutes.
Stir
in the sugar, soy sauce, water, stock cube, wine and
sherry and simmer, covered, for a further 5 minutes.
Transfer the mixture to a warmed serving dish and
serve at once.