Preheat the oven to 375°
Sauté the sliced peppers and onions in a little bit of oil and season the lightly with salt and pepper.
Add in the shaved steak and lightly season that with salt and pepper also.
Once this steak is cooked all the way through, add the butter and Worcestershire sauce and stir that into the steak for about two minutes
Stir in the cheese whiz until it’s evenly combined with the steak and turn the heat off while you prepare the slider buns.
Add the bottom half of the slider buns to a baking dish and place the provolone cheese on top.
Add the cooked onions, peppers, and steak on top of the provolone cheese and evenly spread it out.
Now, place the top of the buns on top of the steak.
Next, in a small bowl, stir together the melted butter, garlic powder, salt, pepper, and parsley.
Evenly spread the butter on top of the buns. Cover the baking dish with foil and place it in the oven for 10 minutes.
Remove the foil and let the slider buns cook for an additional 5 to 10 minutes. Check on it after five minutes to be sure it’s not getting too dark on top.
Finally, remove the baking dish from the oven, let the sliders, cool slightly. Serve warm and enjoy!