Slice cucumbers into bite-sized rounds or diagonally into thin pieces
Place cucumbers in a bowl and sprinkle with salt
Let them sit for 10-15 minutes to release excess water, then drain and pat dry
In a small bowl, mix rice vinegar, soy sauce, sugar, sesame oil, minced garlic, and red pepper flakes
Toss cucumbers in the dressing and let them marinate for at least 20 minutes (or longer for more flavor)
Garnish with toasted sesame seeds before serving