Step 1: Prepare the Cucumbers: Thinly slice the cucumbers, either using a mandoline or a sharp knife. Aim for slices that are almost translucent. Place the sliced cucumbers in a colander, sprinkle with a pinch of salt, and let them sit for 10-15 minutes. This process helps to draw out excess moisture, resulting in a crisper salad. After 10-15 minutes, gently press the cucumbers to remove any remaining water.
Step 2: Create the Dressing: In a small bowl, whisk together the soy sauce, rice vinegar, sesame oil, sugar, minced garlic, and red pepper flakes. Ensure the sugar is fully dissolved and the dressing is well combined. Taste and adjust the seasoning as needed, adding more vinegar for tanginess or sugar for sweetness.
Step 3: Combine and Marinate: Transfer the drained cucumber slices to a mixing bowl. Pour the dressing over the cucumbers and gently toss to coat them evenly. Be careful not to over-mix, as this can bruise the cucumbers.
Step 4: Chill and Serve: Cover the bowl and refrigerate for at least 30 minutes to allow the flavors to meld. For optimal flavor development, chilling for 1-2 hours is recommended. Before serving, sprinkle with toasted sesame seeds, if desired. Serve chilled as a refreshing appetizer or side dish.
Optional Tips: For a milder flavor, remove the cucumber seeds before slicing. If rice vinegar is unavailable, white wine vinegar can be used as a substitute. Adjust the amount of red pepper flakes to control the spice level.