Steak and Potato Salad Recipe

In a large resealable plastic bag, combine the vinegar, oil and soy sauce; add steak. Seal bag and turn to coat. Refrigerate for 1 hour or overnight. Drain and discard marinade. Grill steak over medium heat or broil 3-4 in. from the heat for 8-10 minutes on each side or until meat reaches desired doneness (for medium-rare, a meat thermometer should read 145 °; medium, 160 °; well-done, 170 °). Slice into thin strips across the grain and place in a large bowl. Add the potatoes, green pepper, onions, parsley and dressing; toss to coat. Serve on lettuce if desired.