Sprinkle salt over cucumbers and gently massage into them. Let cucumbers soak in salt for 10-20 minutes. Rinse with cold water at least 2 times to completely remove the salt. Strain and set aside.
Combine sauce ingredients in a separate bowl. If you're not sure about how spicy you like the salad, add only ½ teaspoon of red pepper flakes and adjust later if needed.
Pour sauce over cucumbers and gently mix. Taste for seasoning and add more salt/black pepper if needed.
Top with more red pepper flakes and toasted peanuts. I also like to add some chopped cilantro for serving. Enjoy!