2 tablespoons ketchup
2 tablespoons red wine vinegar or cider vinegar
2 teaspoons vegetable oil
2 teaspoons soy sauce
1 teaspoon Worcestershire sauce
1/4 teaspoon prepared mustard
1/4 teaspoon garlic powder
1/4 teaspoon salt
1/4 teaspoon pepper
3/4 pound boneless beef chuck steak (3/4 inch thick)
In a resealable plastic bag, combine the ketchup, vinegar, oil, soy sauce, Worcestershire sauce, mustard, garlic powder, salt and pepper; add meat. Seal bag and turn to coat; refrigerate 8 hours or overnight.
Drain and discard marinade. Grill, covered, over medium heat or broil 4 in. from heat for 6-8 minutes on each side or until meat reaches desired doneness (for medium-rare, a meat thermometer should read 145 degrees F; medium, 160 degrees F; well-done, 170 degrees F).