How to Make Philly Cheesesteak Stuffed Peppers

Step 1 - Pre-roast the peppers: Preheat the oven to 400 degrees F. Slice the bell peppers in half lengthwise through the stem and remove all seeds and white membrane. Lightly brush the outsides with olive oil and place cut-side down on a parchment-lined baking sheet. Roast for 10 minutes until the pepper walls are beginning to soften but still holding their shape. Remove from the oven, flip to cut-side up, and set aside while you prepare the filling. Do not turn off the oven.

Step 2 - Caramelize the onions: Heat one tablespoon of butter in a large skillet over medium-low heat. Add the thinly sliced onion and a pinch of salt and cook, stirring every three to four minutes, for 15 to 18 minutes until the onions are deep golden brown, completely soft, and jammy throughout. Do not rush this step with higher heat — genuine caramelization requires low, patient heat. Once caramelized, push the onions to the side of the pan and increase the heat to medium.

Step 3 - Cook the vegetables and beef: Add the remaining tablespoon of butter to the center of the pan. Add the mushrooms and diced green pepper and cook for 3 to 4 minutes until the mushrooms are golden and the pepper is softened. Add the minced garlic and cook for 60 seconds. Push everything to the sides and add the beef — either thinly sliced steak or ground beef — to the center of the pan. Cook the beef, breaking it apart if using ground, for 4 to 5 minutes until fully browned. Add the Worcestershire sauce, garlic powder, smoked paprika, salt, and pepper and stir everything together — beef, onions, mushrooms, and peppers — until evenly combined and coated in the seasoning.

Step 4 - Fill the peppers: Spoon the cheesesteak filling generously into each pre-roasted pepper half, packing it lightly and mounding it slightly above the rim of the pepper. Every pepper half should be completely full — an underfilled pepper produces a disproportionately small filling-to-pepper ratio that makes the dish feel more like a stuffed vegetable side dish than a satisfying main course. Place a slice of provolone over the top of each filled pepper, pressing it gently so it conforms to the shape of the filling and covers the surface completely.

Step 5 - Bake and serve: Return the filled and cheese-topped peppers to the 400-degree F oven and bake for 15 to 18 minutes until the provolone is fully melted, bubbling, and golden brown in spots. For a deeper browning on the cheese, switch the oven to broil for the final 2 minutes — watch closely as provolone goes from golden to dark very quickly under the broiler. Remove from the oven, rest for 3 minutes, then garnish with chopped fresh parsley and serve immediately directly from the baking sheet.