Place beef in plastic bag with Worcestershire sauce, salt and pepper. Turn steak to coat evenly. Marinate for at least 1 hour in refrigerator.
Remove beef from marinade. Place beef on grill, on medium heat. Grill, covered, for 7 to 11 minutes. for medium rare (145°F) to medium (160°F) doneness, turning occasionally.
Remove from grill and slice steaks across the grain.
Add cherry tomatoes to grill for 2-3 minutes or until burst.
Fill platter or large salad bowl with mixed greens. Top with burst tomatoes, avocado slices, sliced red onion, and blue cheese crumbles. Top with steak and serve with dressing of your choice.