Here is a Philly Cheesesteak Casserole that will become your easy go-to dish. With a combined prep and cook time of just under 30 minutes, this delicious meal is a great choice for those busy weeknights and a casserole the whole family will love. 

This budget friendly low carb Philly Cheesesteak Casserole is made using simple ingredients. It’s a fantastic solution to feed a hungry crowd who enjoy savory flavors when you’re in a hurry. 

This recipe is a perfect combination of flavors to create a mouthwatering dish while staying true to your low carb lifestyle.

If you love easy weeknight meals, try our Keto BBQ Chicken Casserole. For meat lovers our Keto Meatballs.

Why you'll love this Philly Cheesesteak Casserole

This casserole is a one-pot wonder, which means minimal clean-up. It’s also super simple to make – if you’re looking for an easy dinner idea, this steak casserole is a winner!

This keto Philly cheesesteak casserole can be on the table in 30 minutes. 

This is a low-carb Philly cheesesteak casserole, a perfect dish if you're watching your carbs. With much lower net carbs than a traditional Philly cheesesteak sandwich, this casserole is keto friendly without sacrificing flavor.

There are so many ways to serve this recipe. It’s a brilliant main course- hearty and satisfying. It also makes a great appetizer!

This simple casserole recipe is perfect for meal prep. Prepare it over the weekend, to plan ahead for those busy weeknights.

The entire family will love this juicy steak recipe. It’s a total crowd and people pleaser. 

What is a Philly Cheesesteak Casserole

A Philly Cheesesteak casserole is all that’s good about the classic sandwich, minus the carbs and gluten. 

This dish delivers a juicy, succulent filling of steak slices with onion and peppers, topped with a golden cheesy crust.

This recipe makes a delicious dinner or appetizer and is the ultimate low-carb comforting food casserole!

Ingredients in our Philly Cheese Steak Casserole

• Olive Oil – Go for extra virgin olive oil for its rich flavor and health benefits.
• Sirloin Steak - Select a good quality sirloin steak that is well-marbled and tender. 
• Red Onion -  Its flavor becomes mellow when cooked.
• Bell Peppers -  Choose a mix of bell peppers in different colors, such as green, red, and yellow.
• Minced Garlic - Fresh minced garlic is pungent and aromatic.
• Beef Broth - Choose a low-sodium beef broth to control the overall saltiness of the recipe.
• Worcestershire Sauce - This is a signature ingredient in Philly cheesesteak recipes. Don’t skip it! For a classic brand, try Lea & Perrins.
• Sliced American Cheese - Provides a creamy and melty texture. It contributes to the iconic "cheesesteak" taste.
• Tomato - These add a slightly acidic element to balance the richness of the cheese and steak.
• Provolone Cheese - An even layer of this cheese results in a delicious golden-brown topping.

If you have any questions about this easy Philly cheesesteak casserole recipe, please leave a comment below and we will get back to you.

How to make this Cheesesteak Casserole Recipe

Cook the meat. Preheat the oven to 350 degrees F. Heat half of the olive oil over medium-high heat in an oven-safe skillet. Add the thinly sliced beef; season it, and saute it until browned. Remove it from the pan and set it aside.

Add in the veggies. Add the onion and bell peppers to the skillet, season with salt and pepper, and cook for 3-5 minutes, until softened. Add in the garlic and cook for 30-60 seconds.

Create the sauce. Stir in the broth and Worcestershire sauce. Return the beef to the pan, then layer the American cheese on top of everything. 

Cover the pan and simmer, allowing the cheese to melt, then remove the lid and stir it into the beef and veggies. Reduce the heat to medium and let it simmer until the sauce thickens.

Get ready to bake. Sprinkle the top with chopped tomatoes, then sprinkle or layer on the provolone cheese. You can also transfer the mixture to a casserole dish at this point if you would like. 

Bake the keto casserole. Bake for 10-15 minutes until the cheese is melted and the casserole is heated through. Broil for 2-3 minutes for a golden brown top.

For the complete list of ingredients and instructions, please see the printable recipe card below.

Don't forget dessert! Try our No Bake Keto Cheesecake and our Keto Chocolate cake.

What to Serve with Philly Cheesesteak Casserole

Here are a few sides that perfectly complement the casserole, offering a satisfying dining experience for the whole family:

• Keto Broccoli Salad: Packed with nutrients and flavor, a Keto Broccoli Salad brings a vibrant and tangy element to your plate. The combination of crisp broccoli florets, greens, and a creamy dressing pairs well with this hearty casserole.
• Keto Bread or Keto Rolls: Make a Philly cheesesteak sandwich using keto bread and this Philly cheesesteak casserole. Bliss!
• Zucchini Noodles: For those who enjoy a pasta-like experience without the carbs, zucchini noodles (or "zoodles") are a fantastic choice. These spiralized zucchini strands offer a satisfying texture that pairs exceptionally well with the saucy Philly Cheesesteak Casserole.
• Cauliflower Rice: Cauliflower rice is a versatile, low-carb alternative to traditional rice. Its mild flavor and light texture make it a perfect companion to the robust flavors of the casserole, allowing you to enjoy a complete and balanced meal.
• Spaghetti Squash: Another clever alternative to pasta, spaghetti squash provides a stringy texture that resembles spaghetti noodles.
• Keto Tortilla Chips (for a nacho-style experience): Craving a bit of crunch? Opt for keto-friendly tortilla chips to add a playful twist to your meal. You can enjoy your casserole "nacho-style" by scoping up the cheesy goodness with these chips.

Best tips for making a Philly Cheesesteak Casserole with Steak

Grass-fed is best. It has all the flavor and comes out butter-tender. We love its rich taste and the fact that it has a high nutritional value. See this article to learn more about grass-fed beef.

When cutting the steak, aim for thin slices. Thin slices ensure the beef cooks quickly and evenly in the skillet and casserole. 

The last thing you want is to overcook your sliced sirloin steak, so keep an eye on it while browning it in the skillet. A quick sear will give you flavor and caramelization without toughening the meat. Remember your steak will still be heated in the oven as part of the casserole.

Make sure to broil your cheesesteak casserole for the last 2-3 minutes. You need that broil element to achieve golden perfection. 

Distribute the cheese evenly over the casserole to ensure every bite has a cheesy goodness. 

We like to rest this casserole dish before serving it. This makes serving and cutting easier.

How to best store your Philly Cheese Steak Casserole

Store any leftover casserole in an airtight container.  This will prevent it from drying out and keep the flavors locked in. 

Store the casserole in the refrigerator for 4 to 5 days.

Reheating the casserole in the oven is the best option for this dish. Preheat your oven to around 350°F (175°C). Cover the casserole dish with aluminum foil to stop the top from browning or drying out too quickly. Reheat for about 15-20 minutes. 

You can use the microwave to reheat the casserole if you're short on time. Keep in mind that the texture might not be as crisp as when reheated in the oven.

Reheating on the stovetop is a good option to prevent the casserole from becoming soggy. Add a little water or broth to the bottom of the pan to create steam and prevent sticking. 

Avoid overheating the casserole, as it can lead to it drying out and losing flavor.

It's worth noting that this Philly Cheesesteak Casserole doesn't freeze well. Freezing can alter the texture of the cheese and vegetables upon thawing and reheating.

Variations to this Cheese Steak Casserole

Here are some tasty ways to switch this base recipe:

• Instead of sirloin, use other cuts of tender beef like ribeye steak or flank steak. Ribeye is extra rich and even more marbled. Flank steak is a little leaner. 
• Swap out sliced steak for lean ground beef. Brown the ground beef before layering it into the casserole. 
• Add sautéed mushrooms to the vegetable mix. 
• Bring some heat by mixing in sliced jalapeños or red chili flakes. 
• Mix and match cheeses like cheddar, mozzarella, Swiss, or blue cheese. 
• Embrace the true Philly experience by adding chopped pickled hot peppers, or cherry peppers to your casserole. 
• Serve your casserole with a side of salsa and slices of creamy avocado. The fresh flavors complement the rich casserole beautifully.

Other Delicious, Easy Casserole Recipes

Keto BBQ Chicken Casserole -Tangy, cheesy, and packed with flavor, this one pot keto friendly meal is easy to make and delicious for the entire family.

Keto Taco Casserole - Make this meaty, cheesy, low carb taco casserole any time you're in the mood for an easy to make, filling, and delicious meal.

Keto Chicken Bacon Ranch Casserole - Perfect, low-carb comfort meal. It's cheesy, creamy, full of healthy protein, and is an easy way to feed the whole family with minimal effort.

Keto Green Bean Casserole - is a low carb version of the classic - and it's all made from scratch without any need for canned soup.

Keto Breakfast Casserole - A hearty, savory dish packed with protein, veggies, and melty cheese to keep you full and happy all day long.

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