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Philly Cheese Steak Foil Packet Dinners

Philly cheesesteak foil packet dinners with tender steak, peppers, onions, and mushrooms sealed in heavy-duty foil and grilled until steamy. Melty provolone finishes the packets so each serving is an all-in-one meal with easy cleanup.
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Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes
Servings: 4 servings
Cuisine: American
Calories: 850
Ingredients Equipment Method Notes

Ingredients
  

Foil packet filling
  • 1.5 lb sirloin steak Thinly sliced so it cooks evenly in the packets.
  • 2 bell peppers Sliced.
  • 1 onion Sliced.
  • 2 cup mushrooms Sliced.
  • 8 slice provolone cheese Use 2 slices per packet.
  • 2 tbsp Worcestershire sauce
  • 2 tbsp olive oil
  • 1 tsp garlic powder
  • 0.25 salt To taste.
  • 0.25 pepper To taste.
  • 4 heavy-duty foil Large sheets for sealing packets.
  • 1 hoagie rolls Optional, for serving.

Equipment

  • 1 sheet pan

Method
 

Assemble foil packets
  1. Divide the sirloin steak, bell peppers, onion, and mushrooms among 4 heavy-duty foil sheets.
  2. Drizzle each packet with olive oil and Worcestershire sauce.
  3. Season each packet with garlic powder, salt, and pepper.
  4. Top each packet with 2 slices of provolone cheese so it sits over the filling.
  5. Fold the foil into sealed packets, pressing the seams closed to trap steam (visual cue: no gaps at the edges).
Grill and serve
  1. Grill the packets over medium heat for 18-20 minutes, flipping halfway (visual cue: steam should billow when opened).
  2. Carefully open the packets and serve in hoagie rolls or as-is (visual cue: melted provolone should stretch over the steak and vegetables).

Notes

For the juiciest results, slice the steak thin so it cooks through within 18-20 minutes; if your slices are thicker, grill closer to 20 minutes. Refrigerate leftovers in a sealed container up to 3 days. Freezing is not recommended due to texture changes from cheese and vegetables. For a lighter option, use reduced-fat provolone (or provolone slices) without changing the cooking time.