Sardines may be fried, baked, or grilled. They cook quickly. To bake, rub sardine fillets with olive oil and add simple seasonings like lemon, garlic, and parsley. Coat the fillets in similarly seasoned breadcrumbs and fry them in a skillet or bake them. Mash sardines and blend them with garlic, onion, egg, and breadcrumbs to make fish cakes. Sardines are a key ingredient in the classic Sicilian dish pasta con le sarde.