STEP 1: PREHEAT THE OVEN

Begin by preheating your oven to 425°F (220°C). This high temperature is essential for creating a beautiful crust on the roast beef.

STEP 2: PREPARE THE MEAT

Take the beef roast out of the refrigerator and allow it to come to room temperature for about 30 minutes. This helps the meat cook more evenly.

STEP 3: MAKE THE HERB PASTE

In a small bowl, combine the minced garlic, chopped rosemary, olive oil, salt, pepper, and Dijon mustard (if using). Mix until you have a paste-like consistency.

STEP 4: SEASON THE ROAST

Rub the herb paste generously all over the beef roast, ensuring it is well coated. This step is crucial as it allows the flavors to penetrate the meat.

STEP 5: SEAR THE MEAT

In a hot, oven-safe skillet, sear the beef roast on all sides for about 3-4 minutes per side until browned. This step adds depth of flavor and a beautiful crust.

STEP 6: ROAST IN THE OVEN

Transfer the skillet to the preheated oven. Roast the beef for approximately 50-60 minutes, or until a meat thermometer inserted into the thickest part reads 135°F (57°C) for medium-rare. Adjust the time if you prefer your beef more well-done.

STEP 7: REST THE MEAT

Once cooked to your liking, remove the roast from the oven and let it rest on a cutting board for about 20-30 minutes. This resting period allows the juices to redistribute, ensuring a juicy roast.

STEP 8: MAKE THE GRAVY (OPTIONAL)

While the roast is resting, you can make a delicious gravy. Pour off excess fat from the skillet, leaving about a tablespoon. Add the beef broth and Worcestershire sauce to the skillet, scraping up any browned bits from the bottom.

In a small bowl, mix the cornstarch with a bit of water to create a slurry. Add this to the skillet and bring the mixture to a simmer. Cook until thickened, then season with salt and pepper to taste.