A TEXAS BARBECUE involves some kind of meat, or combination of meats, cooked slowly in a pit or on a special grill over mesquite, hickory or oak coals until just the right degree of smoked goodness is reached. Quite often it is an event of some magnitude and requires a number of helpers and advisers. The meat can be brisket, ribs, sausage, chicken, goat, lamb,pork or whatever is available.