01 - Preheat oven to 375°F.
02 - Heat olive oil in a large skillet over medium heat. Add onions and peppers, sauté until softened and lightly caramelized, about 7–8 minutes. Add garlic and cook for 1 minute.
03 - Push vegetables to the side of the pan. Add ground beef and cook, breaking up the meat, until browned and cooked through, about 6–8 minutes. Drain excess fat if needed.
04 - Stir together beef and vegetables. Add Worcestershire sauce, salt, and black pepper. Cook for 2 more minutes.
05 - Slice hoagie rolls and spread butter on the insides. Place on a baking tray and toast in the oven for 3–5 minutes until lightly crisp.
06 - Scoop hot beef mixture evenly into the rolls. Top each with a slice of provolone. Return to the oven for 2–3 minutes, or until cheese is melted.
07 - Serve immediately, optionally with pickled peppers or extra condiments.