I think seafood in general will be high in iodine.

This recipe was created by a scientist and posted years ago. I will admit I haven't made it, but it's also supposed to be quite good:  

That sounds like really encouraging progress, and it is great that you are narrowing things down so carefully. It can be surprising how something like added iodine in a milk alternative might make a difference for some people with dermatitis herpetiformis-type symptoms, so your note may definitely help someone else who is still dealing with that last bit of itching. It also sounds like you are finding a more comfortable routine with almond and soy milk, simple safe meals, and watching individual triggers like tuna without feeling completely restricted. This really is a learning curve, and keeping track of what improves or worsens symptoms is often the only way to spot patterns. I hope the dermatology appointment goes well...let us know.

Thank you I will have a look

This is the best gluten-free bread I have tried. It is quite time consuming to make for a bread machine recipe as it requires 3 different flours, 3 different starches and a lot of other ingredients.   https://www.glutenfreealchemist.com/gluten-free-bread-machine-recipe-bread-maker/