Try This Tasty Top Sirloin Roast Beef Recipe

Gather the ingredients. The Spruce / Abbey Littlejohn Pat the roast dry with paper towels. The Spruce / Abbey Littlejohn Using a sharp paring knife, make slits over the entire surface of the roast and insert the garlic slivers. The Spruce / Abbey Littlejohn In a small bowl, mix together the thyme, 1 1/2 teaspoons kosher salt, 1/2 teaspoon pepper, and 3 tablespoons of the oil. The Spruce / Abbey Littlejohn Brush this mixture on all sides of the roast. The Spruce / Abbey Littlejohn Arrange one rack at the center position in the oven and another at a lower position and preheat the oven to 450 F. Lightly oil the bottom of a medium, flameproof roasting pan. The Spruce / Abbey Littlejohn Stand the roast, fat-side up, in the center of the pan. This particular cut of beef sometimes tips over as it roasts. To prevent this, use a roasting rack with sides that you can adjust to steady the meat. Roast the meat for 15 minutes. The Spruce / Abbey Littlejohn While the meat is roasting, prepare the onions and mushrooms. Oil a large, rimmed baking sheet generously. Peel the onions and cut them into wedges 3/4-inch thick, leaving the root ends intact. The Spruce / Abbey Littlejohn Cut mushrooms in half, if larger. Arrange mushrooms and onions on the greased baking sheet. Drizzle both with the remaining 1/2 cup olive oil. Toss the vegetables lightly to coat well, adding more oil if necessary. Salt and pepper the vegetables. The Spruce / Abbey Littlejohn After the meat has roasted for 15 minutes, reduce the heat to 350 F and place the pan with the vegetables on the lower shelf. Continue to roast the beef until an instant-read thermometer inserted into the center of the meat registers 130 to 135 F, about 50 to 60 minutes. Roast the vegetables, stirring every 15 minutes, for 50 to 60 minutes, until slightly browned and charred around the edges. The Spruce / Abbey Littlejohn When done, transfer the roast to a cutting board and let rest for 20 minutes, loosely covered with foil. Reserve the juices in the pan. The Spruce / Abbey Littlejohn If the vegetables are not done when the roast is, continue roasting a few minutes more, checking every 5 minutes until done. Remove the vegetables and tent them with foil to keep warm. The Spruce / Abbey Littlejohn Skim off and discard any fat in the roasting pan. Place the pan over medium-high heat, and add the broth and wine. With a wire whisk, scrape up any browned bits on the bottom of the pan into the liquids. Bring the mixture to a simmer, and reduce by half. The Spruce / Abbey Littlejohn Then swirl in the butter. Season with salt and pepper. The Spruce / Abbey Littlejohn Cut the roast, crosswise against the grain, into slices 1/4-inch thick and arrange on a serving platter. Garnish the platter with bouquets of watercress and surround the meat with the onions and mushrooms. Drizzle the sliced meat with some sauce and pass the extra sauce separately. Top each serving with a thin slice of blue cheese (optional). The Spruce / Abbey Littlejohn