To prepare cucumbers, slice the cucumbers in half lengthwise. Then, slice each half lengthwise two or three times lengthwise. Cut the long slices into bite-size pieces and place them in a colander. Sprinkle the Kosher salt over the bite-sized pieces and toss them in a colander. Set aside
In a large mixing bowl, combine the peanut butter, sesame oil, tamari, rice vinegar, honey, and minced garlic. Whisk well to combine. Set aside.
Using a cutting board, roughly chop the peanuts with the cilantro and red pepper flakes until you get a nice topping consistency that can be easily sprinkled.
Add the cucumber pieces to the dressing and toss to combine.
Plate roughly half the dressed cucumber pieces into a serving bowl or platter and sprinkle with half of the peanut cilantro topping. Add the rest of the dressed cucumber pieces and top with the remaining topping.
Serve immediately or can be made up to 8 hours before serving.