Philly Cheesesteak Casserole

This Philly Cheesesteak Casserole is a baked twist on the classic cheesesteak sandwich, combining seasoned beef, sautéed onions and peppers, and melted cheese into one hearty, oven-baked dish. It delivers familiar flavors in a simple, family-friendly format that’s easy to prepare and perfect for busy weeknights.

With layers of savory beef, tender vegetables, and gooey cheese, this casserole is satisfying on its own or served alongside a simple salad. It’s a comforting, crowd-pleasing meal made with everyday ingredients.

Ingredients

• 1½ lbs ground beef (or thinly sliced beef)

• 1 tablespoon olive oil

• 1 medium onion, diced

• 1 green bell pepper, diced

• 1 red bell pepper, diced

• 2 cloves garlic, minced

• 1 teaspoon salt

• ½ teaspoon black pepper

• 1 teaspoon Worcestershire sauce

• 1 cup beef broth

• 1 tablespoon cornstarch (optional, for thickening)

• 2 cups shredded mozzarella or provolone cheese

• ½ cup shredded cheddar cheese (optional)

• 1 teaspoon dried parsley or Italian seasoning

Instructions

Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set aside.

Step 2: Cook the Beef

Heat olive oil in a large skillet over medium heat. Add the ground beef and cook until browned, breaking it apart as it cooks. Drain excess grease if needed.

Step 3: Sauté the Vegetables

Add the diced onion, green pepper, red pepper, and garlic to the skillet. Cook for 5–7 minutes, stirring occasionally, until the vegetables are softened.

Season with salt, black pepper, and Worcestershire sauce.

Step 4: Add the Sauce

Pour in the beef broth. If you prefer a thicker casserole, stir the cornstarch into a small amount of cold water and add it to the skillet. Simmer for 2–3 minutes until slightly thickened.

Remove from heat.

Step 5: Assemble the Casserole

Transfer the beef mixture evenly into the prepared baking dish. Sprinkle mozzarella (or provolone) evenly over the top, followed by cheddar cheese if using. Finish with dried parsley or Italian seasoning.

Step 6: Bake

Bake uncovered for 20–25 minutes, or until the cheese is fully melted and lightly golden on top.

Let rest for 5 minutes before serving.

Serving Suggestions

This casserole pairs well with:

• A fresh green salad

• Roasted vegetables

• Garlic bread or dinner rolls

Storage Tips

• Store leftovers in an airtight container in the refrigerator for up to 3 days

• Reheat in the oven or microwave until warmed through

Recipe Notes

• Provolone cheese gives the most traditional flavor

• You can substitute ground beef with thin-sliced steak if desired

• Avoid overbaking to keep the casserole moist