1 piece English cucumber (5 in. long, 6 oz.), rinsed
12 rounds edible rice paper wrappers (also called dried egg roll or dried spring roll wrappers; about 8 in.)
1 spiny or rock lobster tail (about 12 oz.), thawed if frozen
3 c salad mix (about 3 oz.), rinsed & crisped
Directions
Step #1 In a 4- to 5-quart pan over high heat, bring about 2 quarts water to a boil.
Step #2 Add lobster; when boil resumes, reduce heat & let simmer until meat is opaque but still moist-looking in center of thickest part (cut to test), about 10 mins.
Step #3 Drain lobster, then immerse in ice water until cool to touch, about 5 mins; drain again.
Step #4 Meanwhile, cut pit & peel from mango & discard; cut fruit into small chunks.
Step #5 Cut cucumber lengthwise into thin slices; stack slices & cut stack lengthwise to make 3/8-inch-wide sticks.
Step #6 With scissors, snip underside of lobster shell free from back shell & lift off.
Step #7 Pull out lobster tail; discard shell.
Step #8 If vein is present, pull out & discard.
Step #9 Coarsely chop meat & put into a bowl.
Step #10 Add mango, onion, & mint; mix carefully.
Step #11 Shape 2 rolls at a time: Immerse 1 rice paper round In a large-ish bowl of hot tap water, drain briefly, lift out, & lay on a counter.
Step #12 Let stand until paper is soft & pliable, about 30 seconds.
Step #13 Repeat to moisten another rice paper round & lay on counter.
Step #14 Working quickly, spoon about 1/12 of the filling down the center of each wrapper, leaving 1 inch of the wrapper bare at both ends.
Step #15 Lay 1/12 of the cucumber sticks parallel to the filling & mound 1/2 c salad mix on top.
Step #16 Fold the 1-inch ends of each wrapper over filling, holding filling in place with your fingers, then, roll wrapper snugly around it.
Step #17 Press wrapper edges to seal; if edges are too dry to stick, moisten with a little more hot water.
Step #18 Set each roll, seam down, on a platter & cover airtight with plastic wrap.
Step #19 Repeat steps 4 through 6 to fill remaining rice paper wrappers (replace water in bowl as needed to keep hot).
Step #20 If making rolls up to 3 hrs ahead, chill in the fridge.
Step #21 Uncover rolls & cut each in half diagonally; if desired, stand rolls upright, cut ends up.