Cook the rice noodles according to package instructions, then rinse under cold water and drain.

In a large bowl, combine the noodles, cabbage, carrots, bell pepper, cucumber, peanuts, and cilantro.

Whisk together peanut butter, soy sauce, honey, lime juice, sesame oil, and red pepper flakes to make the dressing.

Pour the dressing over the noodle mixture and toss until everything is well coated.

Serve immediately or refrigerate until ready to serve, adding the dressing just before serving if stored separately.