Now this one is effortless

Now this one is effortless, especially when you use the prepared crayfish tails in brine which are available at many supermarkets and fishmongers. They are, I suppose, equivalent to peeled prawns in brine tastewise and mixed with mayonnaise in a sandwich they are just fine.

8 slices of good bread of your choice
Soft butter
150g or more if you wish of crayfish in brine, drained
4tbsp good quality mayonnaise
100g watercress
Salt and freshly ground black pepper
Lemon wedges to serve

Pick through the watercress and discard any thick stalks and brown leaves. Mix the crayfish with the mayonnaise and season with salt and pepper. Butter the bread and divide the watercress and crayfish between then. Sandwich them together and cut the crusts off if you prefer. Serve with lemon wedges.