Перескажи этот текст кратко : Cucumber sandwiches are a summer must in Britain. You need two slices of buttered white bread and thin slices of cucumber, nothing more. To be tasty they have to be done really well. Cucumbers and salt them. Leave them for ten minutes to let salt take out some water from the cucumbers. Lay out a few pieces of kitchen paper on the kitchen table, place the cucumber slices on them, and pat dry with more papaer.If you want, you can sprinkle some lemon juice on cucumber slices. White bread has to be soft - the softer, the better. Neither mayonnaise nor margarine can be used instead of butter. You don`t need to add more salt but you can use white pepper to season your sandwiches. It adds flavour