1 pound Persian (mini) cucumbers
Use a chef’s knife to cut the ends off of the cucumbers and discard the ends. Transfer the trimmed cucumbers to a large resealable plastic bag, press out the extra air, then seal the bag shut.
Use a rolling pin to gently smash the cucumbers inside the bag until they’re flattened and broken into long spears and irregular pieces.
¾ teaspoon kosher salt
Set a colander over a large bowl or set it in the sink. Pour the cucumbers into the colander and use your hands to tear them into bite-sized pieces. Sprinkle the pieces with the kosher salt, and stir with a spoon until the salt evenly coats the cucumbers. Let sit until the extra liquid drains away, about 5 minutes.
1 tablespoon Chinese black vinegar, 1 ½ teaspoons toasted sesame oil, 1 teaspoon granulated sugar
Meanwhile, in a large serving bowl, whisk together the vinegar, oil, and sugar until well combined.
1 teaspoon sesame seeds, Chili crisp or chili oil, to taste
Transfer the drained cucumbers to the serving bowl with the dressing and stir until well coated. Sprinkle with the sesame seeds and drizzle with chili crisp or chili oil, if you like a little spice, and serve immediately.