This Easy Philly Cheese Steak Casserole takes all the savory, cheesy flavors of a classic Philly cheesesteak and turns them into a simple, naturally gluten-free baked dinner.
Preheat oven to 400°F. In a large skillet, sauté the onions, green bell peppers, and mushrooms over medium heat until onions are translucent, about 5–7 minutes. Transfer to a 9x13-inch casserole dish.
In the same pan, add the ground beef, minced garlic, paprika, chili powder, oregano, basil, and salt. Cook until the beef is browned but still slightly pink.
Add the beef mixture to the casserole dish and stir in ¾ cup of shredded cheddar cheese.
In a small bowl, whisk together the eggs and heavy cream. Pour evenly over the beef and vegetable mixture.
Top with the remaining ¼ cup cheese.
Bake for 25 minutes or until the top is golden and bubbly. Let cool slightly before serving.
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Notes
Cook veggies first: Sautéing the onions, peppers, and mushrooms brings out their flavor and prevents a watery casserole.
Don’t overcook the beef: Leaving it slightly pink before baking keeps it juicy and prevents it from drying out in the oven.
Whisk eggs and cream well: A smooth, evenly mixed custard ensures even texture throughout the casserole.
Let it rest before slicing: Allow the casserole to cool for 5–10 minutes after baking so it sets properly and slices cleanly.
Use a glass or ceramic baking dish: These materials distribute heat more evenly than metal pans for a more consistent bake.
Double the cheese: For a cheesier top, add extra shredded cheese during the last 5 minutes of baking.