I'm afraid I don’t happen to have a stuffed flounder recipe. But our sister site, EasyEverydayCooking.com, has a chicken recipe that you could easily adapt for flounder (or any other mild, thin fish fillets): Crab-Stuffed Chicken. Instead of stuffing the crab filling in the pocket of a chicken breast, place a large spoonful on top of a flounder fillet, then roll up the fillet (starting at a short end) around the filling. Proceed as the recipe directs, but you may not need to bake the flounder rolls as long as you would chicken – just make sure the rolls are cooked though.