4 beef round (sirloin) tip side steaks, cut 1 inch thick (about 8 ounces each)
2/3 cup prepared balsamic vinaigrette
2 tablespoons Dijon-style mustard
Combine marinade ingredients in small bowl. Remove and reserve 2 tablespoons. Place beef steaks and remaining marinade in food-safe plastic bag; turn steaks to coat. Close bag securely and marinate in refrigerator 15 minutes to 2 hours.