Pressed Reuben Waffle Sandwich

Name: Pressed Reuben Waffle Sandwich
Ingredients: 2 cups rye flour; 2 cups all-purpose flour; 1 teaspoon baking soda; 1 teaspoon baking powder; 1 teaspoon salt; 1/2 cup good-quality beer (recommended: stout or porter); 1 cup cold whole milk; 2 eggs, lightly beaten; 1 tablespoon caraway seeds; Nonstick spray; 1 pound thinly sliced corned beef; 1/2 pound thinly sliced Swiss cheese; 2 cups sauerkraut, rinsed and drained; 1/2 cup Big Daddy's Thousand Island, recipe follows; 3/4 cup mayonnaise; 1/4 cup ketchup; 3 tablespoons sweet pickle relish; 1 1/2 tablespoons prepared horseradish; 1 teaspoons red wine vinegar; Pinch of salt; Pinch of coarsely ground black pepper