I know the words “leftover” and “fried fish” are rarely used in the same sentence, but there are times when I have a few fillets remaining at the end of the night. Typically, these get eaten cold, standing in front of the refrigerator as greasy tonic for the previous night’s over-indulgence. There is, however, another way. Leftover fried fish fillets also make great fish cakes for lunch the next day. They’re incredibly simple to make, and don’t take long. Mine are typically catfish, but just about any firm, white fleshed fish will do.