Start by dicing the green bell pepper and chopping the onion. Slice the mushrooms to make sure everything cooks evenly.

Heat 2 tablespoons of butter and 1 tablespoon of vegetable oil in a large skillet over medium heat. Add the chopped onions, bell peppers, and mushrooms. Sauté them for about 5-7 minutes. You want them to be tender and slightly caramelized. The aroma will waft through your kitchen.

In the same skillet, push the veggies to one side. Add the remaining butter and oil, then throw in the thinly sliced beef. Sprinkle the sea salt, garlic powder, black pepper, and smoked paprika. Allow it to cook for 3-4 minutes. Stir occasionally until the beef is browned and cooked through.

Drizzle Worcestershire sauce over the cooked beef and veggies. This is your flavor booster! Stir well to combine everything.

Once everything is nicely combined, place slices of provolone on top of the beef and cover with a lid. Let it sit for about 2 minutes or until the cheese is perfectly melted.

While the cheese melts, toast your hoagie rolls in the oven or on a hot skillet for a couple of minutes. You want them golden and crispy.

Finally, load your hoagie rolls with the delicious beef, veggies, and gooey cheese mixture. Top with sliced pickled jalapeños if you crave a bit of heat.