Blanch the udon noodles in boiling water, then rinse with cold water.
Thinly slice cucumber, cherry tomatoes, and red cabbage.
Cut the lettuce into bite-sized pieces.
Place the blanched udon noodles and prepared vegetables in a bowl.
Shred the chicken breast into bite-size pieces and add on top.
Mix soy sauce, vinegar, olive oil, and a little sugar to make the dressing.
Drizzle the dressing evenly over everything to finish.