Combine the Peanut Dipping Sauce ingredients. Mix briefly, then microwave for 30 seconds. Mix again until smooth. Set aside to cool.

Adjust sourness with vinegar and salt, and spiciness to taste.

Place vermicelli noodles in a bowl and cover with warm water for 2 minutes, then drain.

Peel the prawns, slice in half lengthwise and devein.

Remove the crunchy core of the lettuce leaves.

Place some vermicelli noodles and bean sprouts in a lettuce leaf, then roll it up.

Fill a large bowl with warm water. Submerge the rice papers for 2 seconds.

Place the rice papers on a board with the smooth side down.

On the top part of the rice paper, place 3 prawns with a mint leaf in between.

Place the lettuce bundle with the seam side down onto the middle of the rice paper.

Fold the left and right edges of the rice paper in, then roll up to cover the lettuce bundle.

Serve immediately with the peanut dipping sauce.