Chill steaks in the freezer, about 15 to 20minutes. Do not freeze
Once steaks are chilled, slice very thinly, cover and place in fridge
Set grill to medium heat around 350°, start warming cast iron skillet
Once grill and skillet are at temp, place onions and peppers in skillet with 1 tbsp. of butter
Cook onions and peppers down about 7 to 10minutes; add mushrooms to skillet with 1 tbsp butter and cook down about 5 minutes
Place buns on grill to toast, about 2 to 3 minutes and set aside when done
Increase temp of grill to about 450°
Place a handful of the steak on the hot spot of the skillet and let cook, adding 1 tsp of butter and seasoning with salt, pepper, and 1 tbsp. of steak seasoning
Place a few jalapenos to the side of the steak and let them cook alongside
Once steak is about ¾ths cooked, about 2minutes, add some of the cooked veggies to the steak mixture and toss together
Top the steak mixture with 2 slices of provolone cheese
Squirt some water next to both sides of the steak mixture, about 1 tbsp. each side and cover with lid
Let the cheese melt for about 30 seconds and then scoop the mixture onto a toasted bun and serve