Roasting a whole fish is one of the simplest and most impressive things you can cook — and most home cooks never do it, which is a shame. A whole branzino or snapper stuffed with lemon slices and fresh herbs, rubbed with olive oil, and roasted at high heat until the skin crackles and the flesh is perfectly moist. The bones keep the meat juicy in a way fillets cannot replicate. Twenty minutes of active work for something that looks like a dinner party centerpiece.