Hard boil eggs. Quench and let them cool down. Mix mustard, mayonnaise and yoghurt. Season with salt, pepper, some sugar and cucumber stock.
Cut the cucumbers into slices. Cut turkey and cheese into strips. Wash chives, shake dry and cut into fine rolls. Cut the eggs into eight pieces. Mix the prepared ingredients with the salad dressing.
Heat oil and butter in a large frying pan. Halve the slices of bread (or quarter them depending on size) and toast them until crispy. Remove from the pan and let it cool down. Cover with turkey and cheese salad and sprinkle with chives.