Allow roast to come to room temperature on counter for 2 hours before cooking.
Rub olive oil over all sides of roast.
Mix together dry onion flakes, Italian seasonings, garlic, kosher salt and dry mustard in a small bowl.
Sprinkle rub over all sides of meat, pressing into roast beef.
Grilling Method: Prepare grill to a 300° fire.
Set roast over fire and sear on both sides, about 10 minutes.
Using a spatula, set roast over indirect heat and cook about 1 hour or until internal temperature reaches 135° to 140°.
Remove from to a cutting board, Tent with foil. Rest for 20 minutes before slicing.
Oven Method: Preheat oven to 375°.
Place roast into a roasting pan with a rack or use a wire cooling rack on a cookie sheet.
Brown roast for about 20 minutes. Reduce oven to 300° and cook about 1 hour or until internal temperature reaches 135° to 140°.
Cover cooked roast with foil and rest for 20 minutes before slicing.