Prepare the Dipping Sauce: In a small mixing bowl, whisk together peanut butter, orange juice, rice vinegar, tamari, maple syrup, ginger, and red pepper flakes until smooth and creamy. If the sauce is too thick, add warm water one tablespoon at a time until desired consistency is reached. Taste and adjust flavor—add more ginger or red pepper flakes for a punchier sauce.
Wash and Slice Vegetables: Rinse and dry all produce thoroughly. Slice the radishes into thin rounds, shred the cabbage finely, cut carrots into thin matchsticks, and julienne the red pepper and cucumbers. Keep the lettuce leaves whole but trimmed. Remove large cilantro stems and keep leaves whole or coarsely chopped.
Set Up for Rolling: Fill a large shallow plate or pie dish with warm water. Place a clean, flat work surface nearby. Lay a damp kitchen towel over your surface to prevent sticking. Have all vegetables and herbs arranged in small bowls or on a tray for easy access.
Soften the Rice Paper: Dip one sheet of rice paper into the warm water for about 8–10 seconds. Once it becomes flexible and translucent, remove it and lay it flat on the damp surface. Avoid over-soaking, or the wrapper will tear easily.
Assemble the Spring Roll: Begin by layering a few radish slices slightly below the center of the wrapper—they’ll show through once rolled. Add a lettuce leaf, a small handful of cabbage, a few carrot sticks, red pepper slices, cucumber strips, and a sprig or two of cilantro.
Wrap Like a Burrito: Fold the bottom of the rice paper up over the filling. Then fold in the sides, tucking gently but firmly. Continue to roll upward, keeping tension on the roll without tearing the wrapper. The rice paper will naturally seal itself at the end.
Repeat and Serve: Place the completed roll on a serving platter lined with a damp towel. Cover with another slightly damp towel to keep them moist. Repeat the process with remaining wrappers and filling ingredients. Serve with the peanut dipping sauce in a small bowl garnished with chopped peanuts and extra red pepper flakes if desired.