Let sliced venison sit on counter to come up in temperature for about 20 minutes.
While the venison comes to temp, preheat your grill, griddle, or cast iron pan.
Butter each hoagie roll with ½ tablespoon of butter and set aside.
Once the griddle is hot, add the hoagie buns, buttered side down and toast until golden brown, about 2 minutes. Remove buns from griddle and set aside to keep warm.
Add 1 tablespoon butter and 1 tablespoon avocado oil to the griddle, followed by the sliced peppers, onions, and a generous pinch of the venison rub. Stir to combine and cook for 3 – 5 minutes, or until vegetables begin to soften.
When vegetables have softened, move over to one side of the griddle. Add the remaining tablespoon of butter and tablespoon of avocado oil to the empty side of the griddle. Add the sliced venison in an even layer, followed by the remaining venison rub and Worcestershire sauce.
Stir to combine and cook for 2 minutes. Flip the meat and cook for another minute or so more before combining the steak with the peppers and onions.
Turn off the heat. Divide the venison and vegetables into four portions and top each portion with two slices of provolone cheese. Grab the warms roll and, if necessary, cover the meat so the heat remains and cheese can melt for a minute or two.
While the cheese melts, spread toasted buns with mayo, if using.
Transfer each portion of cheesesteak filling to prepared buns and enjoy immediately!