Basically, any bread would work, it doesn't have to be exactly like what I used. A savory scone would be fine, or any soft bread. I would probably also be good over any starchy food, like mashed potatoes or rice. That's the fun of cooking things like this: the experimentation! And since you're not a fan of tuna, try it with sausage or some other meat! (See the comment Kerris left on this post, with the sausage and sauteed onions... yum! 😋)