Boil a pot of water and cook the brown rice noodles according to the package instructions, then drain and rinse with cold water to stop the cooking process.
Poach the chicken breast in simmering water for 12-15 minutes until it reaches an internal temperature of 165°F, then slice it into thin strips.
In a small mixing bowl, whisk together the peanut butter, tamari, lime juice, sesame oil, honey, grated ginger, minced garlic, and sriracha until the sauce is smooth.
In a large bowl, combine the cooked noodles, sliced chicken, shredded carrots, sliced red bell pepper, and shredded purple cabbage.
Pour the peanut sauce over the noodle mixture and toss thoroughly with tongs until all ingredients are evenly coated.
Garnish the bowl with fresh chopped cilantro and serve immediately or store in an airtight container for a meal-prep friendly lunch.