Turkey and Stuffing Waffle Croque-Madame Sandwich

"This recipe appears in: The Stuffing Waffle Croque Madame: The Ultimate Day-After-Thanksgiving Breakfast Sandwich Stuffing waffles, turkey, gravy cheese sauce, and a fried egg. [Photographs: J. Kenji Lopez-Alt] Slices of turkey on top of a crisp stuffing waffle, all covered with a cheesy gravy sauce that gets broiled until browned and bubble before being topped off with a fried egg. This is the stuff morning-after-Thanksgiving dreams are made of. Why this recipe works: * A traditional white cheese sauce is made by whisking cheese into a milk-based sauce thickened with flour and butter. Instead, we use a flour and butter-thickened gravy as the base of our cheese sauce. * Adding the sauce in two layers gives you more complex flavors with the browned cheese underneath and the fresh cheese gravy on top. * Stuffing waffles provide plenty of wells for gravy and egg to pool. Note: Use a stuffing recipe that contains eggs for the best results. We tested this recipe using our Classic Sage and Sausage Stuffing. Special equipment: Belgian affle iron, hand blender Serious Eats Turkey and Stuffing Waffle Croque-Madame Sandwich Reading Options: Cooking Mode Text Only Ingredients * Vegetable oil or non-stick cooking spray * 1 quart leftover or uncooked stuffing (see note above) * 2 cups leftover gravy * 8 ounces grated Comté or gruyère cheese * 1 pound sliced roast turkey breast * 1 tablespoon butter * 4 eggs * Kosher salt and freshly ground black pepper * 2 tablespoons chopped fresh herbs such as parsley, chives, tarragon, or chervil Directions * 1. Adjust oven rack to 5 inches below broiler element and preheat broiler to low. Preheat a four-well Belgian waffle iron according to manufacturer's instructions. Spray with non-stick cooking spray and add 1 cup of stuffing to each well. Close waffle iron and cook, turning occasionally, until cooked through and crisp, 10 to 12 minutes. Set waffles aside. * 2. While waffles bake, make the gravy cheese sauce. Heat gravy in a medium skillet over medium-high heat, whisking frequently, until simmering. Remove from heat and whisk in 6 ounces of cheese. Continue whisking until completely smooth. For a glossier sauce, blend with a hand blender until shiny, about 1 minute. Keep warm. * 3. Place the waffles in a large oven-safe skillet or on a foil-lined broiler pan. Top with sliced turkey. Ladle half of cheese sauce over turkey, followed by remaining grated cheese. Broil until cheese is melted and bubbly, about 3 minutes. * 4. Meanwhile, fry the eggs. Melt the butter in a large cast iron or non-stick skillet over medium-high heat. Add the eggs and cook until whites are cooked through but yolks are still liquid, about 2 minutes. * 5. Top broiled turkey waffles with fried eggs, ladle remaining gravy over the whites of the eggs, season with salt and pepper, sprinkle with herbs, and serve immediately...."