1 lb (450g) ribeye or sirloin steak, thinly sliced (or ground beef for easier prep)
1 tbsp olive oil
1 large onion, sliced
1 green bell pepper, sliced
1 red bell pepper, sliced
2 cloves garlic, minced
1 tsp Worcestershire sauce
½ tsp dried oregano
½ tsp black pepper
Salt to taste
For the Cheesy Topping:
1 cup shredded provolone cheese
1 cup shredded mozzarella cheese
½ cup grated Parmesan cheese
2 tbsp butter, melted
1 cup soft hoagie or French rolls, cubed (optional – for crust)
Instructions
Prep the steak & veggies
Heat olive oil in a large skillet over medium-high heat.
Add steak and cook 3–4 minutes until browned. Remove and set aside.
In the same pan, add onions and peppers. Sauté 6–8 minutes until soft and slightly caramelized.
Add garlic, Worcestershire sauce, oregano, salt, and pepper. Stir in cooked steak.
Preheat oven & prep dish
Preheat oven to 375°F (190°C).
Lightly grease a 9×13-inch baking dish.
Assemble the casserole
Spread steak and veggie mixture evenly in the dish.
Top with provolone, mozzarella, and Parmesan.
Optional: Sprinkle with cubed hoagie rolls and drizzle with melted butter for a crunchy top.
Bake
Bake for 15–20 minutes, or until cheese is bubbly and golden on top.
For extra browning, broil 1–2 minutes (watch closely!).
Serve
Let cool 5 minutes before serving.
Scoop into bowls or serve straight from the dish.
For extra richness, stir a splash of cream or cream of mushroom soup into the filling.
Tips for the Best Cheesesteak Casserole
Slice steak
thinly
Cooks quickly and stays tender
Don’t skip the
Worcestershire sauce
Adds savory depth
Use
freshly shredded cheese
Melts better than pre-shredded (which has anti-caking agents)
Add
hot cherry peppers
For authentic Philly heat
Let it rest before serving
Helps flavors settle and prevents burns
Easy Variations to Try
Ground beef version
Easier prep — great for budget-friendly meals
Cheesesteak dip
Skip the bake, serve warm in a bread bowl
Low-carb option
Skip the bread cubes — serve over cauliflower rice
Vegetarian twist
Use portobello mushrooms or plant-based steak
Add mushrooms
For extra umami and texture
Frequently Asked Questions
Can I use frozen steak?
Not recommended — fresh or thawed steak works best for texture and flavor.
Can I make it ahead?
Yes! Assemble the casserole (without baking), cover, and refrigerate for up to 24 hours. Add 5 minutes to baking time.
Can I freeze leftovers?
Absolutely! Cool completely, then freeze in airtight containers for up to 3 months. Reheat in the oven or microwave.
Can I add cheese whiz?
Yes — stir in ½ cup Cheez Whiz or processed provolone sauce for an ultra-authentic Philly taste.
Final Thoughts
You don’t need a trip to Philadelphia to enjoy the rich, savory flavor of a real cheesesteak.
With this Philly Cheesesteak Casserole, you get all the melty cheese, tender meat, and sweet peppers — baked into a comforting, shareable dish that’s perfect for busy nights or game-day spreads.
So next time you’re craving something bold, cheesy, and deeply satisfying…
skip the takeout.
Make this instead.
Because the best comfort food isn’t complicated —
it’s warm, hearty, and shared with joy.
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