Heat your grill to a medium-high temperature.
In a mixing bowl, whisk together the balsamic glaze, olive oil, garlic granules, onion granules, salt, and pepper.
Coat the flank steak in the mixture and marinate for a minimum of 30 minutes, or up to 2 hours.
Prepare the corn by grilling fresh cobs for 10-12 minutes or sautéing frozen corn until warmed through.
Grill the marinated steak for about 4-5 minutes on each side for medium-rare, adjusting for preferred doneness.
Let the steak rest for 5 minutes before slicing thinly against the grain.
In a large bowl, combine salad greens, cherry tomatoes, grilled corn, blue cheese, and red onion. Toss gently.
Arrange sliced steak on top and drizzle with balsamic dressing just before serving.