If your little ones don't like fish very much, I suggest you prepare these croquettes. They carry hake and also hard-boiled egg and I assure you that they will not be able to resist.
I have made them with hake but you can substitute it for salmon or by other fish you have. If your fish is raw, as in my case, you can cook it in the milk itself with which you will make the dough for the croquettes.
What do you have leftover fish from another meal? Well, clean it well and put it already cooked in your dough. You will get some great croquettes of exploitation.
Hake and hard-boiled egg croquettes
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