→ Meats
01 - 1 lb thinly sliced deli roast beef
→ Breads
02 - 12 slider rolls or mini brioche buns
→ Dairy
03 - 12 slices provolone cheese
04 - 2 tablespoons unsalted butter
→ Vegetables
05 - 1 small yellow onion, thinly sliced
→ Condiments & Sauces
06 - 2 tablespoons mayonnaise (optional)
07 - 1 tablespoon horseradish sauce (optional)
08 - 2 cups beef broth
09 - 1 tablespoon Worcestershire sauce
10 - 1 teaspoon soy sauce
11 - 1/2 teaspoon garlic powder
12 - 1/2 teaspoon onion powder
13 - Salt and black pepper, to taste
→ Garnish (optional)
14 - 1 tablespoon fresh parsley, chopped