Place mashed potato in a bowl; stir in tuna fish,
canned sweet corn and chopped parsley. Season to
taste with salt and black pepper, then shape into
eight patties.
Press the fish cake into 50g/2 oz fresh breadcrumbs
to coat them lightly, then place on a baking sheet.
Cook under a moderate grill until crisp and golden,
turning once. Serve hot with lemon wedges and fresh
vegetables.