Trim the abalones, remove the viscera, and cut into slices. Chop garlic chives into a length of five centimeters. Cut the onion into thin strips and soak them in cold water to get rid of spicy flavor. Mix the trimmed abalone, garlic chives, and onion and season with sesame oil and salt.
You can also season with spicy sauce made with red chili-pepper paste with vinegar.