place cucumber slices in a colander/strainer; sprinkle with salt, tossing well. drain for 1 hour. place cucumber slices on a few layers of paper towels; cover with additional paper towels, pressing down occasionally. combine cucumber, shallots, and next 5 ingredients in a large bowl; mix gently. cover and set aside.
heat a grill pan or griddle over medium-high heat. coat pan with cooking spray. remove chicken from bag; discard marinade. place 4-6 thighs in pan; cook 6 minutes on each side or until done. repeat procedure with remaining thighs if necessary. serve 2 thighs over a bed of cucumbers and enjoy!
mix the red onion, salt, pepper, olive oil and lime juice 