Step 1 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Preheat the oven to 400°F.
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Step 2 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Line a large baking sheet with parchment paper. Set aside.
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Step 3 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Season the steaks on both sides with the salt, black pepper, and garlic powder. Allow them to rest at room temperature while preparing the potatoes.
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Step 4 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Dice the potatoes into 3/4-inch cubes and place on the baking sheet. Slice the mushrooms and mince the garlic. Set aside.
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Step 5 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Drizzle the potatoes with olive oil and season with the thyme, salt, and black pepper. Toss with a rubber spatula to coat.
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Step 6 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Roast the potatoes on middle rack of oven for 25 minutes. At the 20 minute mark, begin searing the steaks.
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Step 7 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Set a large skillet over high heat and add the oil and butter. Once the oil is very hot and shimmering, add the steaks. Sear steaks for 1 minute without moving. Flip and sear the other side for 45 seconds longer, then remove from heat.
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Step 8 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Open the oven door and transfer the seared steaks from the skillet to the center of the baking sheet, pushing the potatoes to the edges of the sheet with a rubber spatula. Keep the drippings in the skillet and set aside. Roast the steaks and potatoes on middle rack of oven until potatoes are browned and crisp and steaks reach desired level of doneness, 9-12 minutes. Allow the meat to reach an internal temperature of at least 130°F for a medium steak. While the steaks roast, saute the mushrooms.
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Step 9 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Check to see that steaks are done. Remove from oven or add time as needed.
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Step 10 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Set the skillet over medium-high heat and add the mushrooms. Saute, stirring frequently, until they are shrunken and golden brown, 6-7 minutes. Add the minced garlic and saute until fragrant, about 30 seconds. Remove the skillet from the heat.
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Step 11 of 11
Oven-Roasted Steak, Potatoes, and Mushrooms
Top the steaks with the sauteed mushrooms. Allow to rest for 5 minutes before serving. Sprinkle with additional salt if desired.