Wash bean sprouts and drain. Put them in a large bowl. Pour the hot water (about 2 cups) over the bean sprouts, stir with chopsticks or fork and let stand for 40-50 seconds. Then put them into a colander to drain. Let cool.
Make dressing. In a small bowl, combine mayonnaise, sesame oil and soy sauce. Mix well
When the beans have cooled, put them into a large bowl, add cucumber and pink salmon. Then add dressing and toss to coat.