You can reheat leftover mussels, but do so carefully to preserve their texture and flavor. Reheating mussels gently is ideal. It is because overheating them can cause them to become rubbery.
Steaming is the best method for reheating mussels. Add a little water, broth, or butter to a covered pan. Then cook over low heat for a few minutes until thoroughly heated. They may become tough if you boil them, thus avoid that.
Reheating mussels in the microwave is another option. But be careful not to overcook them by using low power and short intervals. To keep them moist, wrap them in a moist paper towel.
Never keep mussels at room temperature for too long before reheating them. Eat them within two days and keep them in the refrigerator at all times. Throw away mussels that seem dry or smell bad. Mussels are safe and delicious when stored correctly and reheated carefully.
