Corned Beef and Cabbage on Potato

Name: Corned Beef and Cabbage on Potato
Ingredients: 12 large red bliss potatoes peeled and cut into 1-inch thick slices; 1/2 pound smoked bacon; 3 tablespoons butter; 1/2 head napa cabbage, cut chiffonade; Freshly ground black pepper; 1/2 pound corned beef, finely diced; 2 teaspoons prepared horseradish; 1 tablespoon minced fresh chives; 1 cup milk; 1 small onion, finely chopped; 1 bay leaf; 3 whole cloves; 1/4 teaspoon nutmeg, optional; 2 tablespoons unsalted melted butter; 2 tablespoons cornstarch; 1/2 cup grated Parmesan (1/4 cup for sauce plus 1/8 to 1/4 cup to bind filling and sprinkle on finished appetizers); White pepper; Salt, if needed