Using a vegetable peeler, peel cucumber into long ribbons.
Toss with vinegar, sesame oil and soy sauce.
Garnish with sesame seeds and set aside.
In a small bowl, combine shredded carrot, cabbage, rice wine vinegar and salt.
In another small bowl, combine mayonnaise with chili garlic sauce and lime juice.
To assemble sandwich, scoop out a small amount of the bread from inside the roll.
Brush both sides with mayonnaise mixture and then fill with half the sliced beef.
Top with carrot cabbage mixture, sliced radishes and cilantro.
Serve with cucumber salad.