Grilled Steak and Vegetable Salad from Publix®

Name: Grilled Steak and Vegetable Salad from Publix®
Ingredients: 1 1/2 pounds grilling steaks (strip, rib eye, tenderloin); 1 teaspoon kosher salt, divided; 1/2 teaspoon ground black pepper; 1 medium zucchini, halved lengthwise; 3 plum (Roma) tomatoes, halved; 1 (6 ounce) package fresh sliced portobello mushrooms, stems and gills removed; 2 tablespoons olive oil; 8 tablespoons balsamic glaze (reduced balsamic vinegar), divided; 1 (5 ounce) bag mixed salad greens with arugula; 4 tablespoons Caesar salad dressing, divided