Slice the cucumbers into 1/4-inch rounds and place them in a bowl. Toss with salt and let sit for about 1 hour—this draws out excess moisture so the salad won't become watery. I find this step is crucial for getting a crisp, firm texture rather than a soggy mess. While the cucumbers drain, you can prepare everything else.
While the cucumbers are draining, whisk together the soy sauce, rice vinegar, peanut butter, honey, minced garlic, chili flakes, ground black pepper, sesame oil, and grated ginger in a bowl. Whisk until smooth and well combined—the honey and peanut butter may need a bit of extra whisking to fully incorporate. Taste and adjust seasonings if needed. This sauce is where all the flavor comes from, so take your time to get it right.
Pour the drained cucumbers into a colander and rinse briefly under cold water to remove any excess salt. Transfer them to a serving bowl or platter. I like to pat them dry with a paper towel to remove extra moisture—this prevents the salad from getting diluted. Add the chopped peanuts and fresh parsley to the cucumbers, then pour the peanut sauce from Step 2 over everything.
Toss everything together gently but thoroughly until all the cucumber pieces are coated with the peanut sauce and the peanuts and parsley are evenly distributed. Serve immediately while the salad is fresh and crisp. You can serve it chilled or at room temperature, depending on your preference.