01 - Combine the julienned daikon, carrots, cucumber, and bell pepper in a large mixing bowl. For maximum crispiness, sprinkle 1 tablespoon salt over the vegetables, toss thoroughly, and let stand for 15 minutes. Rinse under cold running water and drain completely.
02 - In a small saucepan over medium heat, combine rice vinegar, water, sugar, and salt. Stir continuously until sugar and salt dissolve completely. Remove from heat and allow brine to cool to room temperature.
03 - Layer the prepared vegetables, chilies, garlic slices, and peppercorns into a clean 1-quart glass jar or container, packing tightly to minimize air pockets.
04 - Pour the cooled brine over the vegetables, ensuring all pieces are completely submerged. Seal the jar tightly with the lid.
05 - Refrigerate for at least 2 hours before serving. For optimal flavor development, marinate overnight. Store refrigerated and consume within 2 weeks.