01 - Cook rice vermicelli noodles according to package directions, rinse thoroughly with cold water, and drain well. Julienne the carrot and cucumber into thin matchsticks. Wash, dry, and tear lettuce leaves into appropriate sizes. Pat all herbs dry and remove tough stems.
02 - Fill a large shallow dish with warm water. Submerge one rice paper wrapper for 5-8 seconds until pliable but not mushy. Lay flat on a clean, damp kitchen towel, smoothing out any wrinkles.
03 - Position 2 shrimp halves cut-side up approximately 2 inches from the wrapper's bottom edge. Add small portions of noodles, carrot, cucumber, lettuce, and mixed herbs above the shrimp. Avoid overfilling to prevent tearing.
04 - Fold the bottom edge tightly over the filling. Fold in both sides toward the center. Continue rolling forward to create a compact cylinder. The wrapper should seal itself. Repeat with remaining ingredients.
05 - Whisk peanut butter, soy sauce, hoisin sauce, sriracha, vinegar, and honey in a small bowl until smooth. Gradually incorporate warm water, 1 tablespoon at a time, until reaching a pourable consistency similar to heavy cream.
06 - Arrange spring rolls on a serving platter with peanut sauce alongside. For best results, serve immediately. If necessary, cover with damp paper towels and refrigerate up to 4 hours before serving.