Preheat and prepare: Preheat the oven to 350°F (177°C). Lightly grease a 9x13-inch baking dish, or a quarter sheet pan works well too.
Slice rolls: Without separating them, carefully and evenly slice the entire sheet of rolls in half horizontally. Place the bottom half in the prepared pan.
1 package 12 count Hawaiian sweet rolls or dinner rolls
Brush on the sauce layers: Mix the Dijon mustard and mayonnaise together and spread evenly on both cut sides of the rolls. Spread a thin layer of cranberry sauce on the bottom rolls.
2 Tbsp. Dijon mustard, 2 Tbsp. mayonnaise, 1/2 cup cranberry sauce
Add meat and stuffing: Evenly layer the turkey (or ham), season the meat with salt and pepper, then a layer of the leftover stuffing.
2-3 cups cooked turkey, 1½ cups leftover stuffing
Top with cheese and rolls: Lay cheese slices evenly over the top. Place the top half of the rolls back on.
6 slices cheese: you can use provolone, Swiss, cheddar cheese, Havarti, gruyere, white cheddar, etc.
Mix the topping and brush: In a small bowl, whisk together all ingredients for the toppings. Generously brush the butter mixture over the tops of the rolls and sprinkle poppyseeds over the top.
4 Tbsp. unsalted butter, 1 tsp. Dijon mustard, 1/2 tsp. Worcestershire sauce, 1/2 tsp. garlic powder, 1/2 tsp. onion powder, 1 tsp. dried herbs, Pinch of salt and pepper, Sprinkle of Poppyseeds, Optional: 1 Tbsp. grated Parmesan for extra flavor
Bake: Cover loosely with foil and bake 15 minutes, then uncover and bake 5-8 more minutes, until golden brown and the cheese is melty. Remove from oven and garnish tops with a pinch of flaky sea salt (like Maldon). Start Timer
Serve warm: Slice into individual sliders and serve with warm leftover gravy for dipping, or enjoy as is!
1/2 cup gravy