-Smith's Deli Roast Beef - Havarti Cheese - Sour Dough Bread - Onions - Mushrooms - Butter - Marsala Wine - Arugula - Salt And Cracked Pepper
Sauté onions and mushrooms in butter. Add marsala wine and deglaze the pan. Simmer for 5 minutes until liquid has evaporated.
Top each slice of bread with roast beef then layer on a slice of Havarti cheese on each open-faced sandwich. You'll create 4 open-faced sandwiches total.
Layer mushrooms and onions on top of the cheese then toast the sandwiches in a toaster oven until cheese is melted and bread is golden brown.