Roast Beef and Cheddar Sliders

Ingredients:

For the Sliders:

• 12-pack Hawaiian rolls or soft slider buns

• ¾ lb (340g) sliced roast beef (deli-style or leftover roast)

• 8 slices cheddar cheese (or shredded cheddar)

• 1 large onion, thinly sliced and caramelised (optional but recommended)

• 2 tbsp mayonnaise or horseradish sauce (optional, for extra flavour)

For the Topping:

• 4 tbsp unsalted butter, melted

• 1 tbsp Dijon mustard

• 1 tbsp Worcestershire sauce

• ½ tsp garlic powder

• 1 tsp onion flakes or everything bagel seasoning

• Pinch of black pepper