1 Porterhouse steak (about 1–1 1 / 2 inches thick), about 20 oz (567 g) 8 oz / 225 g shiitake mushrooms, stems removed and caps sliced 1 Vidalia onion, thinly sliced 3 cloves garlic, minced 2 tbsp (30 ml) olive oil, divided 2 tbsp (30 g) unsalted butter Salt and freshly ground black pepper, to taste Fresh thyme or rosemary (optional, for garnish)
1. **Prepare the Steak**: Remove the porterhouse steak from the refrigerator and let it come to room temperature, about 30 minutes. Season both sides generously with salt and freshly ground black pepper. 2. **Sauté the Mushrooms and Onions**: In a large skillet over medium heat, add 1 tablespoon of olive oil and the butter. Once melted, add the sliced Vidalia onions and a pinch of salt. Cook, stirring occasionally, until the onions start to brown and caramelize, about 8-10 minutes. Add the sliced shiitake mushrooms and continue to cook until they are tender and the onions are fully caramelized, another 5-7 minutes. Stir in the minced garlic and cook for an additional 1-2 minutes until fragrant. Remove the mushroom and onion mixture from the skillet and set aside. 3. **Cook the Steak**: In the same skillet, add the remaining tablespoon of olive oil over medium-high heat. Once hot, add the porterhouse steak. Sear the steak for 4-5 minutes on each side, until a brown crust forms. For medium-rare, continue cooking until the internal temperature reaches 130°F (54°C). 4. **Rest and Serve**: Remove the steak from the skillet and let it rest for 5-10 minutes. Slice the steak against the grain and serve with the sautéed shiitake mushrooms and Vidalia onions on top. Garnish with fresh thyme or rosemary if desired. ---
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