Prep the pan: Heat oven to 350°F (175°C). Line a 9x13-inch baking dish with parchment for easy cleanup.
Split the rolls: Slice the entire sheet of rolls horizontally so you have a top and bottom slab.
Don’t separate them yet.
Mix the sauce: In a small bowl, stir together mayo and mustard. Season with a pinch of salt and pepper.
Build the base: Place the bottom slab in the pan. Spread the mayo-mustard mixture evenly.
Add fillings: Layer your deli meat evenly.
Top with cheese slices, covering to the edges for good melt.
Add fresh crunch (optional): A few tomato slices, pickles, or thin red onions go on now. Avoid soggy ingredients like wet lettuce.
Top it off: Place the top slab of rolls over the fillings.
Make the glaze: Mix melted butter, Worcestershire, honey, garlic powder, onion powder, and a pinch of black pepper. Stir in poppy or sesame seeds if using.
Brush and rest: Brush the glaze generously over the tops.
Let sit 5 minutes so it soaks in.
Bake: Cover loosely with foil and bake 12 minutes. Uncover and bake 5–7 more minutes until the tops are golden and the cheese is melted.
Slice and serve: Let cool 3–4 minutes. Use a serrated knife to cut into 12 sliders.
Serve warm.