Carefully remove the basket and remove the steaks from the basket when done and repeat as many times as necessary to cook all of your steaks. You might have to cook them for 2-3 more minutes if your steaks are very thick.
Place a large pan in medium heat. Once hot, add the olive oil, mushrooms, onions, and peppercorns. Cook for about 8-10 minutes, or until the mushrooms and onions have softened.