Bring beef tenderloin to room temperature by letting it sit out of the refrigerator for 30 minutes to 1 hour before cooking. Once ready to cook, preheat the grill to medium-high heat. Mix rosemary, thyme, garlic powder, sea salt, and black pepper in a bowl. Sprinkle both sides of the beef with seasoning, patting it down to coat it well.
I set up my Weber kettle with a chimney of hot coals on one side and a drip pan on the other. As soon as the grill is hot, it’s time to cook. Place the tenderloin over the hot coals and set a timer for 2 minutes. Turn the loin and repeat every two minutes until its’ seared on 4 sides. (Total of 8 min.) Move the tenderloin to the cool zone.
Sear thick steaks over Direct High heat and finish grilling over Indirect Medium heat turning once halfway through grilling time. Grill roasts and thicker cuts using the Indirect Method for the time given on the chart, or until an instant-read thermometer registers the desired internal temperature.
Add the seared beef, broth, bouillon granules, Worcesetershire sauce, garlic powder, and onion powder to the pot and stir well to combine. Bring to a boil, reduce to a simmer, and cook, covered, for 1 ½ hours or until beef is tender. Remove ½ cup of the beef broth from the pan into a small bowl.