Cook steak: place a large sauté pan on the stove top, turn the heat to high, add the olive oil, steak strips, salt and pepper. Cook the steak for 4-5 minutes using a slotted turner to move the pieces around in the pan as you go. Once the steak is cooked, use a slotted spoon to remove the pieces from the pan and place them into a paper towel lined plate.
Butter and onion: without rinsing or cleaning the pan add the butter, let it start to melt, then add the diced onion. Stir to combine as the onion softens.
Arborio rice and wine: next add the arborio rice to the pan and let it get coated in the melted butter. Once it has been pour in the white wine and stir to combine.
Beef stock: next slowly add in the beef broth, stirring as you go. Let the rice absorb some of this liquid whilst continuing to stir.
Peas and mushrooms: next add the frozen peas to the pan and let them thaw and cook in the liquid mixture. Once they have add the sliced mushrooms to the pan.
Parmesan cheese: once the mushrooms have softened and the liquids have almost entirely been absorbed by the rice add the parmesan cheese. Let it melt and stir to combine it with the rice mixture.
Cooked steak: next add the cooked steak strips back to the pan and gently stir, allowing these to heat through.
Garnish: once the dish has heated through, give it a season with some freshly cracked black pepper and a sprinkling of parmesan cheese. Provide bowls and fork and serve straight away.