Preheat Grill Or Grill Pan To Medium. Spray Mushroom And Eggplant Slices With Nonstick Cooking Spray. Place On Grill And Cook 2 To 3 Minutes, Turning Once, Until Tender. Drizzle With Italian Dressing. Layer Cheese And Roasted Vegetables Evenly Between Slices Of Bread, Creating 2 Sandwiches. Return Sandwiches To Grill. Cook On Each Side For 1 To 2 Minutes Or Until Golden Brown And Cheese Is Melted.