People often tell me that cooking with shellfish is something which they find intimidating. It is really a case of just bunging the shellfish into the pan, then standing back and letting the hob do the work for you.
A lovely fish pie is always a great dish to make ahead and serve for a big family gathering or even a casual supper party with friends. The white wine and leeks make this pie taste a little more sophisticated than usual, but you can use all milk if you are feeding children.