In a large bowl, combine the flour, cornstarch, baking powder, baking soda, and salt; mix well. Add the buttermilk, peanut oil, egg, and sugar. Mix well. Let the batter sit for 30 minutes before cooking the waffles.
Preheat a waffle iron. Follow the directions on your waffle iron to cook the waffles accordingly- you will need at least 4 large size waffles to assemble the sandwiches. Once the waffles are golden, remove from the iron. Allow to cool and split them horizontally. Keep the waffles warm in a low oven, if necessary.
Heat about 3-inches of peanut oil to 375 degrees F in a large enamel or cast iron Dutch oven.
Place flour in a small bowl. In another bowl, mix panko and Cajun seasoning. In a third bowl, mix hot sauce, egg, and water. Remove the tough tendon from each tenderloin. Roll each tender in flour, then in egg mixture, then in panko mix. Fry immediately until the tenderloins are cooked through and golden brown, about 3 to 5 minutes. Season with salt and pepper, to taste. Set aside or keep warm in a low oven.
In a medium bowl, mix mayonnaise, maple syrup, mustard powder, and horseradish.
To assemble the sandwiches: Lay 1/2 of the waffle bottom on an ovenproof plate; top with the 3 chicken tenders, 3 slices of bacon, and 2 slices of Cheddar. Broil the sandwich for a few minutes until the cheese melts. Spread about 3 tablespoons of the maple mayonnaise on the top waffle, and place on the sandwich.
A viewer or guest of the show, who may not be a professional cook, provided this recipe. It has not been tested for home use.