Grilled Steak & Parmesan Salad

1 boneless beef sirloin steak, 1/2 inch thick (1 lb.)
1 cup prepared GOOD SEASONS Italian Salad Dressing (prepared with less oil), divided
1 bag (10 oz.) mixed salad greens
2 medium tomatoes, cut into wedges
1 medium yellow summer squash or zucchini, chopped
1/4 cup KRAFT 100% Grated Parmesan Cheese

PLACE steak and 1/2 cup of the dressing in sealable plastic bag; seal bag. Marinate in the refrigerator 30 minutes. Remove steak from marinade; discard marinade. GRILL or broil steak 5 to 10 minutes on each side or until cooked through. Cut steak across the grain into thin slices. TOSS greens with tomatoes, squash and remaining 1/2 cup dressing. Place on serving platter. Top with steak slices; sprinkle with cheese.

Variation:
Grilled Chicken and Parmesan: Prepare as directed, substituting 4 boneless skinless chicken breast halves (1 lb.) for the sirloin steak.