Whisk the peanut butter, soy sauce, lime juice, maple syrup, sriracha, and 3 tbsp warm water together until smooth. Add the remaining water if needed.

Soak the rice noodles in hot water for 5 to 10 minutes, then drain. Slice all the vegetables into thin matchsticks and arrange them on a plate with the herbs.

Dip one rice paper wrapper in warm water for about 10 seconds, then lay it on a damp towel.

Place a little lettuce, noodles, vegetables, and herbs on the wrapper, fold the bottom over, fold in the sides, and roll tightly. Repeat with all wrappers and serve right away with the peanut sauce.