Prep the pan: Heat the oven to 350°F (175°C). Line a baking sheet with parchment paper or lightly grease it.
Slice the rolls: Keep the rolls together as one slab.
Use a serrated knife to slice horizontally, creating a top and bottom. Place the bottom half on the baking sheet.
Sauté the veggies: In a large skillet, heat olive oil over medium-high. Add onions and peppers with a pinch of salt.
Cook 6–8 minutes, stirring, until soft and lightly browned. Add minced garlic for the last 30 seconds. Transfer to a plate.
Cook the beef: In the same skillet, add 1 tablespoon butter.
Add the sliced beef, breaking it up with tongs. Season with salt, pepper, onion powder, and garlic powder. Cook 2–4 minutes, just until browned.
Stir in Worcestershire. Remove from heat.
Layer the cheese base: Lay half the provolone slices over the bottom rolls, slightly overlapping to cover edge to edge. This creates a melty “barrier” so the bread doesn’t get soggy.
Add the fillings: Spread the cooked beef evenly over the cheese.
Top with the sautéed peppers and onions. Add the remaining cheese slices on top.
Cap and brush: Place the top half of the rolls over the cheese. Melt the remaining 1 tablespoon butter and brush it over the tops.
Sprinkle sesame seeds or everything seasoning if using.
Bake: Cover loosely with foil and bake 12–15 minutes, until the cheese is melted. Uncover and bake 3–5 more minutes to toast the tops lightly.
Slice and serve: Let rest 3 minutes to set. Slice into individual sliders with a serrated knife.
Serve warm.