Recipes: Grilled sirloin tip roast

Preparation:    Preparation time: 40 mins Cooking time: 1 hrs 30 mins Serving: 6 Ingredients: 1 beef sirloin tip roast or beef tri-tip roast (2 to 3 pounds) 1 tablespoon kosher salt 2 teaspoons dried thyme 2 teaspoons garlic powder 1 teaspoon coarsely ground pepper 2 tablespoons olive oil, divided 1 small onion,...