Cheesy roast beef sliders are full of meat, cheddar cheese, and served on savory butter rolls with a flavorful sauce that is simple to make and they reheat well.
Whisk together melted butter, mustard, barbecue sauce, and poppy seeds and set aside.
Slice horizontally through the Hawaiian rolls, keeping the rolls intact. Set aside the top half of the rolls and fit the bottom half into a 9x13 glass baking dish.
Spread mayonnaise over the bottom half of the rolls.
Top with a generous layer of overlapping slices of cheddar cheese.
Mound roast beef over the cheese layer.
Top with another generous layer of cheddar cheese.
Place the tops of the rolls over the prepared sliders (mayonnaise can be added to the top half of the rolls as well.)
Drizzle the butter mixture over the top of the sliders and use a pastry brush to spread the buttery topping around, ensuring even coverage over everything.
Cover the baking dish with aluminum foil and bake for 30 minutes. Remove the aluminum foil and cook for about 5 minutes longer or until the tops of the rolls are toasted and golden brown.
Serve immediately.
Notes
Storage:Store, refrigerated, in an airtight container for 2-3 days or freeze for up to 1 month.Notes:Cover the full pan of sliders with aluminum foil to prevent the sandwiches from over-browning. The tops get toasted faster than the center heats up so it is important to keep them covered until the cheese in the center has melted then you can remove the aluminum foil and brown the tops of the sliders before serving.Having several layers of roast beef in each slider makes them extra delicious.Using a full pound of sliced deli meat will give you that nice layered result. If you prefer just one slice of roast beef in each slider, you can probably get by with a half pound of meat.The butter might seem like a hefty bit of fat poured over the rolls, but man, it soaks into all the nooks and crannies and really makes for a delicious slider. Sometimes grocery stores only have the 12-pack of rolls - buy 2 and use as many as you need to fill your baking dish.