Dip a rice paper into the water, leave for 30 seconds to soften then transfer to board (the paper will continue to soften while you work). Place a couple of mint leaves in centre of paper. Top with some carrot, capsicum, cucumber and spring onion. Add an avocado slice, a couple of cashews and some coriander. Fold ends in then roll up from bottom into a firm roll. Place, seam side down, on a plate and work quickly to make other 11 rolls.