Keto Philly cheesesteak casserole brings the familiar flavors of a Philly cheesesteak into an easy baked dinner. It combines shaved steak, tender onions, bell peppers, cream cheese, and plenty of melted provolone. Everything is covered in a creamy cheese sauce and baked until hot, bubbly, and golden around the edges.

A Low Carb Philly Cheesesteak Dinner

This low carb casserole is a good choice when you want a filling meal without the bread used in a traditional cheesesteak sandwich. The steak provides plenty of protein, while the vegetables add flavor and texture. Cream cheese and provolone create a rich sauce that brings all the ingredients together.

Why This Casserole Works

The recipe uses a few simple cooking steps before everything goes into the oven. The shaved steak is browned first, while the onion and bell pepper are cooked in the same skillet. A separate cheese sauce is then prepared with butter, beef broth, cream cheese, and provolone before being mixed with the steak and vegetables.

Choosing Shaved Steak

Shaved steak is ideal for this recipe because the thin pieces cook quickly and are easy to combine with the vegetables and cheese sauce. Season the steak with salt and pepper before cooking so that the meat develops good flavor as it browns. Avoid overcrowding the skillet if you want the steak to brown rather than steam.

Cooking the Steak

Heat the avocado oil in a large skillet over medium-high heat. Add the seasoned steak and cook until browned, about two minutes per side. Since the steak is thin, it does not need a long cooking time at this stage. It will continue heating when the assembled casserole goes into the oven.

Chopping the Cooked Steak

After browning, remove the steak from the skillet and allow it to cool slightly. Chop it into smaller pieces that are easy to scoop and eat with the vegetables. This also helps the meat distribute more evenly throughout the casserole instead of leaving large pieces in only a few portions.

Sautéing the Vegetables

The onion and bell pepper are cooked in the same skillet used for the steak. Cooking them in the skillet allows them to pick up some of the savory flavor left behind by the meat. Cook the vegetables for about six minutes, or longer if you prefer them softer and more deeply browned.

Adding Garlic Powder

Garlic powder is added after the onion and pepper have softened. It gives the vegetable mixture a gentle garlic flavor without introducing another cooking step. Season the vegetables with additional salt and pepper as needed, keeping in mind that the provolone and beef broth also contribute flavor.

Combining Steak and Vegetables

Return the chopped steak to the skillet with the cooked onion and bell pepper. Stir everything together so the meat and vegetables are evenly distributed. Once combined, remove the skillet from the heat while you prepare the creamy cheese sauce.

Making the Cheese Sauce

The cheese sauce starts with melted butter and beef broth. Bring the mixture to a simmer over medium-high heat, then lower the heat to medium before adding the cubed cream cheese. Whisk regularly as the cream cheese melts so that it blends smoothly into the broth.

Adding the Provolone

Once the cream cheese has melted, lower the heat and add half of the grated provolone. Stir until the cheese melts into the sauce and the mixture becomes thick and creamy. Keeping the heat low at this stage helps the cheese melt smoothly without unnecessary overheating.

Bringing Everything Together

Pour the prepared cheese sauce over the steak and vegetable mixture. Stir thoroughly so the sauce coats the meat, onions, and peppers. Each serving should contain a mixture of steak, vegetables, and creamy cheese rather than having the sauce concentrated in one part of the dish.

Preparing the Casserole Dish

Transfer the combined mixture into a 9 x 9-inch casserole dish. Spread it into an even layer so it heats consistently in the oven. The dish does not need complicated preparation; simply make sure the mixture is distributed evenly before adding the remaining provolone.

Adding the Final Cheese Layer

Sprinkle the remaining grated provolone over the top of the casserole. This creates a melted cheese layer that covers the steak mixture as it bakes. As the casserole heats, the cheese becomes soft and bubbly, giving the finished dish the familiar appeal of a cheese-filled baked dinner.

Baking the Casserole

Bake the assembled casserole at 350°F for 25 to 30 minutes. The goal is for the casserole to become hot throughout and bubbly on top. Since the steak and vegetables have already been cooked, the oven time is mainly used to heat everything together and melt the final layer of cheese.

Watching the Baking Time

Oven temperatures can vary, so begin checking the casserole around the 25-minute mark. When the cheese is fully melted and the casserole is bubbling, it is ready. Avoid leaving it in the oven much longer than needed, as excessive baking can cause the cheese to become overly firm.

Making Softer Vegetables

If you prefer very soft peppers and onions, cook them longer in the skillet before assembling the casserole. A longer sauté also allows the vegetables to develop deeper browning. This is useful if you prefer a softer texture rather than a little bite from the bell pepper.

Keeping the Dish Low Carb

The main ingredients in this casserole are naturally suited to a low carb meal, with steak, vegetables, cream cheese, and provolone forming the base. There is no bread, pasta, rice, or traditional sandwich roll in the recipe. Based on the provided nutrition information, one serving contains 4.26 grams of carbohydrates.

The Role of Cream Cheese

Cream cheese gives the casserole its smooth and creamy texture. When combined with beef broth and melted provolone, it creates a sauce that coats the steak and vegetables. Cubing the cream cheese before adding it to the saucepan helps it soften and melt more evenly.

The Role of Provolone

Provolone is important to the cheesesteak-inspired flavor of this casserole. Some is melted into the sauce, while the rest is placed over the top before baking. This two-stage approach gives the dish both a creamy cheese base and a melted cheese topping.

Using Bell Pepper

The recipe calls for one bell pepper cut into half-inch strips. Red, green, or yellow bell pepper can be used as specified. The pepper adds a mild sweetness and fresh vegetable flavor that works well with the beef, onion, and creamy cheese sauce.

Preparing the Onion

The chopped onion is cooked along with the bell pepper rather than being added raw to the casserole. Sautéing softens the onion and reduces its sharp raw flavor. It also allows the onion to blend more naturally with the steak before the cheese sauce is introduced.

Choosing Avocado Oil

Avocado oil is used to brown the steak because it works well for skillet cooking over medium-high heat. Only one tablespoon is needed to cook the meat. The remaining richness in the casserole comes primarily from butter, cream cheese, provolone, and the steak itself.

A Convenient One-Dish Meal

Although the steak, vegetables, and cheese sauce are prepared separately, they all come together in one casserole dish for the final bake. This makes the recipe practical for a family dinner. Once assembled, the oven takes care of the final heating while you prepare the table or side dishes.

Serving Keto Philly Cheesesteak Casserole

Serve the casserole while it is warm and the cheese is still melted. Because the dish is rich and filling, a moderate portion can make a satisfying main course. If you are serving it to a group, let the casserole rest briefly after baking so it is easier to portion.

Making the Recipe for Meal Prep

The casserole can also be useful for planned meals because the ingredients are filling and the dish produces eight servings. Portioning it after cooking makes it easier to serve individual meals. Store leftovers appropriately in the refrigerator and reheat until hot before serving.

Ground Beef Variation

Ground beef may be used instead of shaved steak according to the recipe, using two pounds of shaved steak. This keeps the recipe consistent with the stated quantities and nutrition information.

Poblano Pepper Variation

Poblano peppers are another optional variation mentioned in the source material. They can provide a different pepper flavor for people who enjoy a little more character from their vegetables. The core recipe, however, uses one bell pepper and does not include poblano peppers.

Cheese Variation

Cheddar cheese can also be used as a variation, but the original recipe calls for grated provolone. Provolone is the cheese used in the recipe card because it fits the intended cheesesteak flavor.

Checking the Cheese Sauce

The sauce should be creamy and thick enough to coat the steak mixture. If it is still very loose after the provolone melts, continue cooking briefly over low heat while stirring. Do not rush this stage by using very high heat, because gentle cooking gives the cheese time to blend into the broth and cream cheese.

Avoiding Dry Steak

Because shaved steak is thin, it cooks quickly. Browning it for about two minutes per side is enough before it goes into the casserole. The meat will receive additional heat during baking, so there is no need to cook it for an extended period in the skillet before assembly.

Making the Casserole Ahead

The recipe takes about 15 minutes of preparation and 45 minutes of cooking according to the supplied recipe card. Preparing the steak and vegetables before making the cheese sauce keeps the process organized. Once the casserole is assembled, it can go directly into the oven for the final baking stage.