01 - Soak rice vermicelli noodles in hot water for 5-7 minutes until tender. Drain thoroughly and rinse with cold water to stop cooking process. Set aside in colander to drain excess moisture.
02 - Julienne carrot and cucumber, removing cucumber seeds. Tear lettuce leaves to appropriate size. Arrange shrimp halves (cut side up for presentation), lettuce, herbs, carrots, cucumber, and drained noodles on work surface in organized piles for easy assembly.
03 - Fill large shallow bowl with warm water. Dip one rice paper wrapper into water for 5-8 seconds until pliable but not fully softened. Remove and lay flat on damp kitchen towel or clean cutting board, smoothing out any wrinkles.
04 - Place small amount of lettuce, noodles, carrot, cucumber, and fresh herbs on lower third of wrapper. Arrange 2-3 shrimp halves on top, cut side facing up. Fold bottom edge over filling, fold in both sides, then roll tightly from bottom to top, applying gentle pressure to seal.
05 - Repeat rolling process with remaining ingredients to make 8 spring rolls total. Place completed rolls on damp surface to prevent drying. Cover with damp cloth if not serving immediately.
06 - Combine peanut butter, hoisin sauce, soy sauce, lime juice, and sriracha in small bowl. Whisk vigorously while gradually adding warm water until smooth and creamy consistency is achieved. Adjust thickness with additional water if desired.
07 - Arrange spring rolls on serving platter. Serve immediately with peanut dipping sauce on the side. For best texture, consume within 2 hours of preparation.