Why Make These Stuffed Peppers? This is the low-carb, gluten-free twist on the classic Philly cheesesteak that delivers all the flavor without the bread. Tender, juicy beef, caramelized onions and peppers, and gooey melted provolone cheese get stuffed into vibrant bell pepper boats and baked until the peppers are tender and the cheese is golden and bubbly. Each bite tastes just like the iconic sandwich—savory, beefy, and satisfying—but with an extra serving of vegetables. They are perfect for keto dieters, weeknight dinners, or anyone looking for a fun, healthy twist on a comfort food classic.
Ingredients
For the peppers: four large bell peppers (any color—red, yellow, orange, or green), one pound thinly sliced ribeye steak or sirloin (or use shaved beef steak), one tablespoon olive oil, one medium yellow onion thinly sliced, one green bell pepper thinly sliced (optional, for extra peppers), eight ounces cremini mushrooms thinly sliced (optional), two cloves garlic minced, one teaspoon salt, half teaspoon black pepper, one teaspoon Worcestershire sauce, and six slices provolone cheese (or eight ounces shredded provolone).
Optional toppings: sliced green onions, fresh parsley, or a drizzle of sriracha mayonnaise.
Equipment Needed
A large skillet (cast-iron or stainless steel), a 9×13 inch baking dish, a sharp knife and cutting board, tongs or a spatula, a small bowl, aluminum foil, and a meat thermometer (optional).
Method
Preheat your oven to 190°C (375°F). Lightly grease a 9×13 inch baking dish with cooking spray.
Prepare the bell peppers. Slice each pepper in half lengthwise through the stem. Remove the seeds and white membranes with a knife or spoon. If the peppers do not sit flat in the baking dish, trim a thin slice off the rounded bottom of each half, being careful not to cut through. Arrange the pepper halves cut-side up in the baking dish. Drizzle with a little olive oil, rub to coat, and season with a pinch of salt and pepper.
In a large skillet over medium-high heat, heat one tablespoon of olive oil. Add the thinly sliced onion and green bell pepper (if using) and cook for three to four minutes until softened. Add the mushrooms (if using) and cook for another three to four minutes until they release their liquid and start to brown. Transfer the vegetables to a plate and set aside.
In the same skillet, add the thinly sliced ribeye steak in a single layer. Do not overcrowd—cook in batches if needed. Season with salt and pepper. Sear for one to two minutes per side until browned. The steak does not need to be cooked through at this point. Add the minced garlic and Worcestershire sauce during the last thirty seconds of cooking, stirring constantly.
Return the cooked vegetables to the skillet with the steak. Stir to combine. If your steak was sliced very thin, it will finish cooking as you stir.
Fill each bell pepper half generously with the steak and vegetable mixture, packing it in slightly. Top each stuffed pepper with one slice of provolone cheese (or a generous sprinkle of shredded provolone). If using sliced cheese, fold or tear it to fit.
Cover the baking dish with aluminum foil. Bake covered for twenty minutes. Remove the foil and bake for another ten to fifteen minutes, until the peppers are tender (a knife should slide in easily) and the cheese is melted and lightly golden. For a browner top, switch the oven to broil for the last two to three minutes, watching carefully to prevent burning.
Let the stuffed peppers rest for five minutes before serving. Garnish with sliced green onions or fresh parsley if desired.
Storage
Refrigerate in an airtight container for up to four days. Reheat in a 175°C (350°F) oven for ten to fifteen minutes or in the microwave. The peppers will soften further upon reheating. Freezing is not recommended—the peppers become mushy and watery when thawed.
Variations
For a chicken Philly version, substitute thinly sliced chicken breast for the steak and use provolone or white American cheese. For a mushroom Philly version (vegetarian), use portobello mushrooms and extra bell peppers instead of steak. Sauté with the same seasonings. For a spicy version, add half a teaspoon of red pepper flakes or a diced jalapeño to the filling. For an extra cheesey version, stir one quarter cup of cream cheese into the filling before stuffing. For a pepper jack version, use pepper jack cheese instead of provolone for a spicy kick. For a steak sauce version, add one tablespoon of A1 steak sauce or Worcestershire sauce to the filling.
Serving Suggestions
Serve as a complete low-carb meal with a side salad dressed in vinaigrette. Pair with roasted broccoli, cauliflower mash, or zucchini noodles. Serve with a dollop of sriracha mayonnaise or horseradish sauce. Garnish with fresh parsley, green onions, or a sprinkle of red pepper flakes. Serve with a side of marinara or au jus for dipping.
Tips for Best Results
Use shaved or very thinly sliced steak. Ribeye is the classic Philly choice for its marbling and tenderness. Look for “shaved beef steak” or “thinly sliced ribeye” at the meat counter. If slicing your own, partially freeze the steak for twenty to thirty minutes to make thin slicing easier. Slice against the grain.
Do not overcook the steak before baking. The steak only needs a quick sear to develop color. It will finish cooking inside the peppers in the oven. Overcooking at this stage will result in tough, dry meat.
Pre-cook the peppers slightly for softer texture. If you prefer very tender peppers (almost falling apart), microwave the pepper halves for two to three minutes before stuffing, or boil them in water for three minutes. For peppers that still have some crunch (which holds up better for meal prep), bake as directed without pre-cooking.
Use a variety of pepper colors for visual appeal. Red, yellow, and orange peppers are sweeter and milder than green peppers. A mix of colors makes the dish look beautiful on the plate. Green peppers have a slightly bitter, grassy flavor that some people love.
Do not overstuff the peppers. Pack the filling in gently but leave a little room for the cheese to melt over the top. Overstuffing can cause the peppers to tip over in the baking dish or the filling to spill out.
Cover for the first half of baking. The foil traps steam, which helps the peppers soften without drying out. Uncovering for the second half allows the cheese to brown and the filling to get a little color on top.
Let the peppers rest before serving. The filling will be very hot straight from the oven. A five minute rest allows the juices to settle and makes the peppers easier to handle.
Make extra filling for another meal. The steak and pepper mixture is delicious on its own. Make a double batch and save the extra to serve over rice, pasta, or mashed potatoes for another night’s dinner.
Use a muffin tin for mini stuffed peppers. Small bell peppers or mini sweet peppers work beautifully as appetizers. Cut the tops off and remove the seeds, then stuff and bake in a greased muffin tin. Reduce baking time to fifteen to twenty minutes total.
Serve with a sharp knife and fork. Stuffed peppers can be messy to eat. A sharp knife makes it easy to cut through the pepper and filling together. Provide a spoon for scooping up any filling that escapes. A side of crusty bread is welcome for sopping up juices if you are not eating low-carb.