Grilled Cod with Spinach and Tomatoes is a healthy and flavorful dish featuring tender cod fillets paired with fresh spinach, juicy tomatoes, and aromatic onions. This quick and easy recipe is perfect for busy weeknights, offering a protein-rich meal packed with nutrients. A drizzle of olive oil and balsamic vinegar enhances the flavors, while melted mozzarella cheese adds a creamy touch.