Heat your pan to medium-high heat and add your olive oil. Let the oil get hot but not smoking hot, then add your chicken along with your garlic + onion seasoning. Cook 5 minutes.
Toss in your peppers and onion along with your salt and pepper. Mix and cook 3-5 minutes constantly stirring.
Add in your mushrooms and more olive oil if needed. Cook 5 minutes, add your garlic and cook for 2 minutes.
Everything should be mixed well and cooked! Lay over your provolone and add a dash of water and cover til cheese melts!
Get some good sub rolls and assemble with mayo with lettuce and tomato! Enjoy!