Remove the steak from the refrigerator 30 minutes before cooking to allow the beef to start to come to room temperature.
Pat the beef dry on both sides with a paper towel.
Season liberally on both sides with sea salt and black pepper.
Place a large skillet over medium heat. When the pan is hot, add the olive oil to the bottom of the pan.
Add the beef to the pan and sear it for 2 minutes.
Flip the meat over and sear the other side for 2 minutes.Remove the steak from the pan and place it on a plate, tented with aluminum foil. Flip the steak over to the other side and cook for an additional 2 minutes
Add the butter to the same pan over medium heat.
Add the mushrooms, onions, salt, black pepper, and red pepper flakes to the pan. Stir to combine.
Sauté the onions and mushrooms until tender, about 5 minutes.
Add the garlic and cook for one to two minutes until fragrant.
Add the wine to deglaze the pan, scraping up all the browned bits from the bottom. Simmer over medium heat for 2 minutes.
Add the crushed tomatoes, fresh basil, and fresh oregano to the pan and stir until well combined.
Simmer the pizzaiola sauce over medium-high heat for 4-5 minutes.
Reduce the heat to medium and add the steak back into the pan. Simmer until the beef reaches an internal temperature of 145°F (medium-rare) or your desired temperature.Use an instant read thermometer to check the temperature. Remove from the heat and add some of the pizzaiola sauce to a plate
Add a piece of the steak to the plate and top with more sauce.