Prepare the dressing by mixing mayo, rice vinegar, hoisin sauce, and garlic. Set aside.
Prepare spring onions, cucumber, and carrot by chopping into desired size pieces. I julienned the carrot.
Carefully remove leaves from lettuce one by one, choosing ones that are shaped well for holding the wrap contents.
Assemble wraps by adding chicken, spring onions, cucumber, and carrot to each lettuce leaf. Drizzle dressing over them. Add salt & pepper if desired and a squeeze of lime juice. Serve immediately.