Firstly, prepare your ingredients, so it's quick and easy to assemble. Keep everything finely sliced or shredded, as you need it to be reasonably pliable when rolling. Combine the lot together in a bowl, so it's evenly mixed.
Next, fill a shallow dish with 1-2cm of lukewarm water. Place a single rice paper sheet in the dish and submerge it, removing it the moment it's soft (this will literally take about 10 seconds). Pull it from the dish, keeping it as flat as possible and lay it out flat on your board.
Pile a strip of filling along the center of the paper, leaving a good amount of space at either end. Fold each end in, and firmly roll up to completely enclose the filling.