Marinated Iowa Beef

Directions

1. Pierce meat generously with meat fork; turn meat and pierce again. In a large resealable plastic bag, combine the vinegar, oil, salad dressing mix and meat tenderizer if desired. Add roast; seal bag and turn to coat. Refrigerate for 8 hours or overnight, turning often.
2. Grill over medium heat for 6-9 minutes on each side or until meat reaches desired doneness.