Soak the rice vermicelli according to package instructions. Once tender, drain and set aside to cool.
While the noodles are soaking, prep your vegetables. Julienne the carrots and cucumber, thinly slice the radishes and green onions, and shred the cabbage. Slice the mango into thin strips and gather any optional add-ins like cooked shrimp, chicken, tofu, or edamame.
Prepare the dressing. Place the peanut butter in a bowl or open mason jar. Warm it in the microwave for about 15 seconds until liquidy, then add the remaining dressing ingredients. Shake or whisk well to combine and emulsify.
Divide the cooked noodles, vegetables, and mango evenly between 4 bowls, as well as any optional add-ins. Drizzle and toss with the dressing, then garnish as desired with herbs. Serve with lime wedges and additional dressing.
Notes
Store leftovers separately in airtight containers.