Arrange desired bread slices on an aluminum foil-lined 15- x 10-inch jelly-roll pan. Top evenly with turkey and Parmesan Cheese Sauce; sprinkle with Parmesan cheese.
Broil 6 inches from heat 4 to 6 minutes or until bubbly and lightly browned; remove from oven. Top with crumbled bacon and tomato slices; serve immediately.
Club-Style Lightened Hot Browns With Caramelized Onions: Melt 2 Tbsp. butter in a medium skillet over medium heat. Add 1 large sweet onion, sliced, and 1/4 tsp. salt. Cook, stirring often, 15 to 20 minutes or until onions are caramel colored. Place desired bread slices on jelly-roll pan, and layer with 1/4 lb. each of sliced deli-roasted turkey, roast beef, and ham. Top with Parmesan Cheese Sauce and onions; sprinkle with Parmesan cheese. Broil as directed. Top with crumbled bacon and tomato slices; serve immediately.
Southwestern Lightened Hot Browns: Substitute 4 (2-inch-thick) square cornbread slices, halved and toasted, for bread. Place on jelly-roll pan, and top with turkey, Spicy Cheese Sauce, and 1 (5-oz) can chopped green chiles, drained. Substitute shredded Mexican four-cheese blend for Parmesan cheese, and sprinkle over sandwiches; broil as directed. Top with crumbled bacon and tomato slices; serve immediately.