Prepare the radish: Trim the roots and tops off the red radishes, then wash them. Slice the radishes in half, then cut into triangular pieces.
Wash the mint leaves: Wash and chiffonade the mint leaves into thin ribbons.
Make the dressing: In a bowl, combine the juice of one lime, white vinegar, white pepper, and salt. Drizzle the dressing over the radishes and let sit for 10 minutes