Corned Beef Hash Quesadilla

Name: Corned Beef Hash Quesadilla
Ingredients: FOR THE HASH:; 1 Tablespoon Unsalted Butter; 1 whole Idaho Potato, Peeled, And Cubed, And Cooked Until Softened; 2 cups Cooked Corned Beef, Sliced And Diced; 1 clove Garlic, Minced; 1 whole Large Shallot, Chopped; ½ Tablespoons Worcestershire Sauce; 1 pinch Salt To Taste; 1 pinch Cracked Black Pepper, To Taste; FOR THE QUESADILLA:; 4 whole Flour Tortillas, Standard Size; 4 slices Swiss Cheese; ¼ cups Shredded Cheddar Jack Cheese; 1-½ cup Cooked Corned Beef Hash, Warmed, More If You Desire; 2 Tablespoons Thousand Island Dressing; 1 Tablespoon Horseradish Sauce