Generously season the entire beef sirloin with salt and pepper.
Slice garlic thinly into arrowhead shapes, then make small incisions in the beef and deeply insert the garlic pieces.
Tie the beef tightly with cooking twine to maintain its shape.
Line the bottom of an oven pan with large chunks of onion, carrot, celery, and thyme, drizzle with olive oil, then place the prepared beef on top.
Lightly oil a pan and sear the beef’s exterior over high heat on all sides until golden brown.
Place the beef in a 190-degree oven and roast for about 30 minutes until the internal temperature reaches 52 degrees, achieving a rare doneness. Remove and let rest.
For mashed potatoes: Cut potatoes into even pieces, boil in chicken stock, then mash while mixing in butter, egg yolk, heavy cream, and a splash of the boiled broth until smooth.
For the deglaze sauce: Pour red wine into the oven pan with the remaining drippings and roasted vegetables, scrape up the fond, and simmer. Add bone broth, tomato paste, and thyme, then bring to a boil. Thicken with cornstarch slurry.
After resting, untie the twine, slice the roast beef thinly, and serve on a plate with mashed potatoes and sauce.
Season beef with salt and pepper, make incisions, insert garlic, and tie tightly with twine.
Sear the beef’s exterior in a pan, then transfer to an oven pan with vegetables and roast at 190 degrees for 30 minutes.
Boil potatoes in chicken stock, then mash with butter, egg yolk, cream, and a bit of broth to make mashed potatoes.
In the same pan used for roasting, add wine, bone broth, and tomato paste, scrape up the fond, and simmer. Thicken with cornstarch slurry to make the sauce.
Slice the rested roast beef thinly and serve with potatoes and sauce.
Cooking tips 💡
After making incisions and inserting garlic, let the beef rest in the refrigerator for about a day to allow the garlic flavor to deeply penetrate the meat.
Tying the beef with twine prevents it from warping during roasting and helps retain juices inside.
Never slice the beef immediately after removing it from the oven—let it rest for 5 to 10 minutes to keep it juicy and tender.
Recommended for 🙋
⭐Those who want to impress at special occasions with a visually stunning meat dish.
⭐Anyone curious about authentic Western-style roast beef and the secret technique behind deglaze sauce.