In a large mixing bowl, combine the shredded imitation crab meat, julienned cucumber, julienned carrot, and thinly sliced red onion.
In a separate small bowl, whisk together the mayonnaise, rice vinegar, sugar, sesame oil, and sriracha sauce (if using) until smooth and creamy.
Pour the dressing over the salad ingredients and toss gently to combine, ensuring everything is evenly coated.
Top the salad with sliced avocado, a sprinkle of sesame seeds, and fresh cilantro leaves for garnish.
Serve immediately or refrigerate for 10-15 minutes to allow the flavors to meld.
Notes
This salad is best served fresh but can be stored in the refrigerator for a few hours if needed. The creamy dressing adds a delicious contrast to the crunch of the vegetables.