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Philly Cheesesteak Casserole: A Comfort Food Classic Reinvented

If you love the rich flavors of a Philly cheesesteak but want a fuss-free, family-friendly version, the Philly Cheesesteak Casserole is your dream dish. This casserole takes the classic sandwich ingredients—thinly sliced beef, sautéed onions and peppers, and melty cheese—and transforms them into a hearty, oven-baked meal that’s perfect for weeknight dinners or gatherings. Here’s a step-by-step guide to making it from scratch.

Ingredients

For the best results, gather these fresh ingredients:

1 pound (450 g) thinly sliced beef (ribeye or sirloin works best)
1 medium onion, thinly sliced
1 medium green bell pepper, thinly sliced
2 cloves garlic, minced
2 cups shredded provolone cheese (or a mix of provolone and mozzarella)
1 can (10.5 oz) cream of mushroom soup
1/2 cup milk
1 tablespoon olive oil
Salt and black pepper, to taste
1 teaspoon Worcestershire sauce (optional, for extra flavor)
1 teaspoon paprika (optional, for mild smokiness)
4 cups cooked white or brown rice, or cubed bread for a “breadier” casserole

Step-by-Step Instructions

Step 1: Preheat the Oven

Start by preheating your oven to 350°F (175°C). Grease a 9×13-inch baking dish lightly with butter or cooking spray to prevent sticking.

Step 2: Sauté the Vegetables

Heat 1 tablespoon of olive oil in a large skillet over medium heat.
Add the sliced onions and bell peppers. Cook for 5–7 minutes, stirring occasionally, until they soften and start to caramelize.
Add the minced garlic and sauté for an additional 1 minute, until fragrant.
Remove the vegetables from the skillet and set aside.