01 - Combine daikon, carrots, cucumber, and bell pepper in a large bowl. For extra crispiness, sprinkle 1 tablespoon salt over vegetables, toss thoroughly, and let stand 15 minutes. Rinse under cold 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 vegetables, chilies, garlic slices, and peppercorns into a clean 1-quart glass jar or container, packing tightly to maximize space.
04 - Pour cooled brine over vegetables, ensuring all pieces remain completely submerged. Seal jar tightly with lid.
05 - Refrigerate for minimum 2 hours before serving. For optimal flavor development, marinate overnight. Store refrigerated and consume within 2 weeks.