Generously season tenderized steaks with ¼ tsp. each salt and pepper on both sides.
Heat olive oil in a large skillet over medium high heat. Once hot, add the steak and sear until browned, approximately 3 minutes on each side. Then, set the steak aside on a plate.
In the same skillet, add more oil, then add 1 tsp. minced garlic, 1 sliced onion, and 2 sliced bell peppers. Cook for a few minutes until they begin to soften.
Add 16 oz. tomato sauce, 1 Tbsp. Italian seasoning, and ¾ cup water. Stir well.
Bring to a simmer, then add your steaks back into the skillet and simmer for 15 minutes on each side.
Transfer steaks to a cutting board. Let them rest for 5 minutes. In the meantime, allow your sauce to continue simmering until it starts to thicken.
Thinly slice your steak against the grain. Top with pizzaiola sauce, plus parsley and cheese if using. Enjoy!