Description

This Philly Cheesesteak Casserole combines all the classic flavors of the beloved sandwich in a convenient and comforting baked dish. Tender roast beef, sautéed bell peppers, onions, garlic, and mushrooms are layered with provolone and mozzarella cheeses, then baked to bubbly perfection. Perfect for a hearty dinner that’s easy to prepare and serves a crowd.

Ingredients

Bell Peppers

1 large green bell pepper
1 large yellow bell pepper
1 large red bell pepper

Vegetable Mix

2 tablespoons salted butter
1 small onion, thinly sliced
3 cloves garlic, minced
8 ounces cremini mushrooms, thinly sliced

Meat and Cheese

1 1/2 pounds deli-style roast beef, thinly sliced
6 slices provolone cheese
1 cup shredded mozzarella cheese

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Instructions

Prepare Peppers: Slice the green, yellow, and red bell peppers, removing all seeds and inner ribs to ensure tenderness.
Sauté Vegetables: In a large skillet, melt the salted butter over medium heat. Add the thinly sliced onion and minced garlic, cooking until fragrant and lightly softened. Stir in the sliced cremini mushrooms and prepared bell peppers, sautéing until all vegetables become tender and flavorful.
Add Beef: Incorporate the thinly sliced roast beef into the vegetable mixture. Season with salt and pepper to taste, stirring well to combine all ingredients evenly.
Assemble Casserole: Transfer the beef and vegetable mixture to a baking dish, spreading it out evenly. Layer the provolone cheese slices over the top, then sprinkle with shredded mozzarella cheese.
Bake: Preheat the oven to 350°F (175°C). Place the casserole in the oven and bake for 15 minutes to allow the flavors to meld and cheese to melt.
Broil: Switch the oven to broil and cook the casserole for an additional 3-5 minutes, watching closely until the cheese topping is browned, bubbly, and slightly crispy on top.
Serve: Remove from oven and let cool slightly before serving. Enjoy the rich and hearty Philly Cheesesteak flavors in every bite.

Notes

You can substitute deli-style roast beef with thinly sliced ribeye for a more authentic cheesesteak taste.
Adjust the cheese quantities based on your preference for cheesiness.
For a spicier kick, add sliced jalapeños or a dash of hot sauce before baking.
This casserole reheats well and can be stored in the refrigerator for up to 3 days.
Consider serving with a side of crusty bread or a fresh green salad for a complete meal.