Plot: We uncover the secrets to injecting flavor into a less-than-perfect cut of beef in our recipe for Inexpensive Charcoal Grill–Roasted Beef, and then serve it alongside Roasted Smashed Potatoes. Inexpensive Charcoal Grill-Roasted Beef with Garlic and Rosemary Grill-roasting seems like an easy way to flavor a less-than-perfect cut of beef—but not if the roast comes out chewy and dry