2. Fill a large bowl with water. Dip one sheet of rice paper into the water and quickly rotate to moisten the entire sheet. Lay the wet rice paper on a flat work surface. Arrange 1 lettuce leaf over the bottom 1/3 of the rice paper, flattening the lettuce to crack the rib. Spread a generous 1 ½ tsp of mayo over the lettuce, then top with 3 mint leaves placed from one end to the other. Place 3 pieces of sliced pork over the mint leaves and top ½ cup of rice noodles.
3. Fold in the left and right sides of the rice paper, then fold the bottom edge up and over the filling tightly and roll toward the top end one full turn to enclose the filling completely. Place the 3 pieces of cut shrimp, cut side up, end to end in a row. Sprinkle the peanuts over the shrimp. Continue rolling as tightly as possible toward the top edge, tucking in the sides, until you have a tight roll.
Repeat with the remaining rice paper and ingredients.
4. The rolls can be made up in advance. Cover with a damp towel until ready to serve. Rolls can be cut or serve as is. Enjoy with peanut sauce.