Cut the duck meat into bite-sized pieces.
Prepare the onion, avocado, cucumber, and cherry tomatoes by cutting them into bite-sized pieces.
Make the sauce by mixing soy sauce, sesame oil, plum syrup, and black pepper.
Add the duck and vegetables to a bowl, pour in the sauce, and mix well.
Place in a serving bowl and finish with a sprinkle of sesame seeds and seaweed flakes.