There are plenty of steak-and-onion salads, but none with a dressing like this one. Worcestershire sauce has just enough acid to balance the vinaigrette's oil.
Cooks' note:
Steak and onions can be cooked in an oiled well-seasoned large (2-burner) ridged grill pan. Grill steak as above but for 9 to 11 minutes, and grill onions in pan (not in grill basket), uncovered.
