Wash the mussels under fresh water.
With a knife, open each mussel and leave the fruit on one half of the shell.
In a bowl, mix all the ingredients for the batter... the batter will be rather soft.
Place all the mussels on a baking sheet and with a teaspon put some batter on each mussel to completely cover the meat/fruit.
Bake for about 15-20 mins at 400F on the top shelf of the oven or until the batter turns golden/light brown.