Dab is a sustainable flat fish similar to sole or plaice - James Martin serves it whole with garlic butter
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James Martin says: "Dab is an excellent alternative to other flat fish such as plaice and sole, and it’s also a lot cheaper. The fish can differ in size – depending on your appetite, you may need two per person. Excellent cooked whole, but get the fishmonger to remove any roe and wash away the bloodline."