Heat grill to medium-high. In a large bowl, toss together steak, peppers, onion, garlic, Italian seasoning, and olive oil and season with salt and pepper.
Place steak mixture in foil packs. Fold up packs and grill, 10 minutes.
Open packs, top with provolone, and cover grill to melt, 2 minutes.
Garnish with parsley and serve.
Recipe by Cooking TV Recipes at https://cookingtv-channel.com/philly-cheesesteak-foil-packs/