If you’re unable to find peeled prawn cutlets, you’ll have to clean and devein them. If you’ve never done them before, it’s not an arduous task. Remove the head of the prawn. Remove the legs and shell until you get a clean cutlet. Using a small sharp knife, make an incision along the top curve of the prawn. The vein will then be exposed. Using the tip of the knife, lift it and pull it out. Give it a good wash and then pat dry.