Step 1

Wrap each cucumber in plastic wrap to minimize splattering. Place on a work surface and pound with a flat object (like a meat pounder) until cucumbers crack and are slightly flattened. Remove from plastic. Cut cucumbers in half; halve each side lengthwise. Slice into 1- to 1 1/2 -inch wide slices. Transfer to a strainer set over a bowl.

Step 2

Sprinkle cucumber with sugar and salt; mix until well combined. Refrigerate bowl and strainer for 30 to 60 minutes so cucumber pieces can drain into the bowl.

Step 3

Place garlic, seasoned rice vinegar, soy sauce, sesame oil, and red pepper flakes in a large bowl. Whisk together thoroughly.

Step 4

Transfer drained cucumbers into bowl with dressing. Toss to coat. Cover with plastic wrap; refrigerate for about 30 minutes to allow flavors to mingle.

Step 5

Place cucumbers in serving bowl and sprinkle with sesame seeds.