Preheat oven to 425°F. Combine Rub ingredients; press evenly onto all surfaces of beef roast.
Place roast on rack in shallow roasting pan. Do not add water or cover. Roast in 425°F oven 30 to 40 minutes for medium rare; 40 to 50 minutes for medium doneness.
Remove roast when instant-read thermometer registers 135°F for medium rare; 150°F for medium. Transfer roast to carving board; tent loosely with aluminum foil. Let stand 20-25 minutes. (Temperature will continue to rise about 10°F to reach 145°F for medium rare; 160°F for medium.)
Meanwhile, prepare Sauce. Combine sherry and garlic in small saucepan; bring to a boil. Cook 1 to 2 minutes or until liquid is reduced by half. Dissolve cornstarch in broth; add to saucepan. Bring to a boil, stirring constantly; cook and stir 2 to 3 minutes or until slightly thickened. Season with salt and ground black pepper, as desired.
Carve half of roast across the grain into thin slices. Serve with half of sauce. Reserve remaining roast and sauce for another recipe.
Nutrition information per serving: 310 Calories; 141.3 kcal Calories from fat; 15.7 g Total Fat; 5.8 g Saturated Fat; 0.1 g Trans Fat; 0.5 g Polyunsaturated Fat; 7.8 g Monounsaturated Fat; 107 mg Cholesterol; 409 mg Sodium; 3.1 g Total Carbohydrate; 0.1 g Dietary Fiber; 0.8 g Total Sugars; 33 g Protein; 0 g Added Sugars; 29.2 mg Calcium; 2.3 mg Iron; 434 mg Potassium; 0 IU Vitamin D; 0.2 mg Riboflavin; 9.3 mg Niacin; 0.7 mg Vitamin B6; 2.2 mcg Vitamin B12; 250 mg Phosphorus; 5.7 mg Zinc; 35.1 mcg Selenium; 125.2 mg Choline;