Homemade Roast Beef & Cheddar Sliders

Ingredients

• 1 1/2 pounds shaved rare roast beef
• 2 cups beef broth
• 3 tablespoons Worcestershire sauce
• 2 tablespoons butter
• 2 tablespoons all-purpose flour
• 1 cup whole milk
• 1/4 teaspoon kosher salt
• 1/4 teaspoon white pepper
• 1/4 teaspoon dry mustard
• Pinch of nutmeg
• 1 1/2 cups shredded sharp white cheddar
• 12 slider rolls
• 2 tablespoons melted butter
• 1-2 tablespoons everything bagel seasoning
• Arby's sauce