Grilled Onion-Butter Cod is a delicious and flavorful seafood dish. The cod fillets are marinated in a mixture of melted butter, onions, garlic, and herbs, which infuses them with a rich and savory taste. Grilling the cod adds a smoky charred flavor and a crispy texture to the fish. This dish is perfect for a summer barbecue or a quick and easy weeknight dinner. Serve the Grilled Onion-Butter Cod with a side of roasted vegetables or a fresh salad for a complete and satisfying meal.