Name: High Protein Low Carb Philly Cheesesteak Casserole
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Yield: 6 servings
Cuisine: American
Ingredients: 1 ½ pounds lean ground beef (90% lean); 1 tablespoon olive oil; 1 large onion, diced; 1 green bell pepper, diced; 1 red bell pepper, diced; 3 cloves garlic, minced; ½ teaspoon salt; ½ teaspoon black pepper; ½ teaspoon smoked paprika; 4 ounces cream cheese, softened; ½ cup unsweetened plain Greek yogurt; 1 tablespoon Worcestershire sauce; 8 ounces provolone cheese, sliced or shredded; ½ cup shredded mozzarella cheese; Fresh parsley, chopped (for garnish, optional)

Hey y'all! If you're craving classic Philly cheesesteak flavor but want something that's both high in protein and low in carbs, this High Protein Low Carb Philly Cheesesteak Casserole is just the ticket. It's loaded with tender beef, melty cheese, and colorful bell peppers for all that savory, comforting goodness. Perfect for busy weeknights, meal prep, or when you want a hearty dish without the carb-heavy bread. Let's get cooking!

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Why You'll Love This High Protein Low Carb Philly Cheesesteak Casserole

Packed with protein to keep you full and satisfied all day.
All the flavors of a classic Philly cheesesteak, minus the bread and extra carbs.
Quick and easy to make in under an hour, perfect for busy schedules.
This casserole is meal-prep friendly and reheats beautifully.
Family-approved for even the pickiest eaters!

Ingredients You'll Need

1 ½ pounds lean ground beef (90% lean)
1 tablespoon olive oil
1 large onion, diced
1 green bell pepper, diced
1 red bell pepper, diced
3 cloves garlic, minced
½ teaspoon salt
½ teaspoon black pepper
½ teaspoon smoked paprika
4 ounces cream cheese, softened
½ cup unsweetened plain Greek yogurt
1 tablespoon Worcestershire sauce
8 ounces provolone cheese, sliced or shredded
½ cup shredded mozzarella cheese
Fresh parsley, chopped (for garnish, optional)

How to Make High Protein Low Carb Philly Cheesesteak Casserole

Step 1: Prep and Sauté the Beef and Veggies

Preheat your oven to 375°F (190°C).
Heat olive oil in a large skillet over medium-high heat.
Add the ground beef and cook for 5-6 minutes, breaking it up as it browns.
Add diced onion, green and red bell peppers, and sauté for another 4-5 minutes until veggies are tender.
Stir in garlic, salt, black pepper, and smoked paprika. Cook for 1 minute until fragrant.

Step 2: Mix in the Creamy Filling

Reduce heat to low. Stir in cream cheese, Greek yogurt, and Worcestershire sauce. Mix until the cream cheese is fully melted and everything is combined.

Step 3: Assemble the Casserole

Transfer the beef mixture to a 9x13-inch baking dish and spread it evenly.
Top evenly with provolone slices, then sprinkle with mozzarella cheese.

Step 4: Bake and Serve

Bake for 18-20 minutes, until the cheese is bubbly and lightly golden.
Let it cool for 5 minutes, then garnish with chopped parsley and serve warm.

Notes

Using lean ground beef helps keep this casserole high in protein and lower in fat.
You can substitute ground turkey or chicken for a lighter twist.
Letting the casserole rest for a few minutes after baking helps it set and makes serving easier.

Variations

Keto Mushroom Twist: Add 1 cup sliced mushrooms for extra fiber and flavor.
Spicy Version: Mix in 1 finely diced jalapeño or a pinch of red pepper flakes for heat.
Dairy-Free: Swap cream cheese and cheese for dairy-free alternatives and use coconut yogurt.

Required Equipment

Large oven-safe skillet or sauté pan
9x13-inch baking dish
Wooden spoon or spatula
Chef's knife and cutting board

Storage Instructions

Store leftovers in an airtight container in the refrigerator for up to 4 days.
Reheat individual portions in the microwave for 1-2 minutes, or warm larger portions in a 350°F (175°C) oven for 10-15 minutes.
Can freeze up to 2 months; thaw in the fridge overnight before reheating.

Serving Suggestions & Pairings

Pair with a crisp green salad or roasted broccoli for a well-rounded meal.
Serve with cauliflower rice or low-carb cloud bread for extra comfort.
Top with sliced avocado or a dollop of Greek yogurt for richness.

Pro Tips for the Best Philly Cheesesteak Casserole

Pat ground beef dry before cooking if it's wet—this helps it brown, not steam.
Layer the cheeses for a gooey, melty topping that tastes just like the real thing.
Use room temperature cream cheese and yogurt for easy blending and a super smooth filling.

Frequently Asked Questions

Can I make this casserole ahead of time?
Yes, assemble the casserole fully, cover, and refrigerate for up to 24 hours before baking. Add 5 extra minutes to the bake time if baking from cold.
Can I use steak strips instead of ground beef?
Absolutely! Thinly slice beef sirloin or ribeye, cook until just browned, and proceed with the recipe as written.
What’s the best low-carb cheese to use?
Provolone and mozzarella are both low in carbs and high in protein—perfect for this casserole!

Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes