Q&A for How to Make a Tuna Sandwich

You should only store tuna salad in the fridge for 3 to 5 days at most. It tends to spoil after that, because it has mayo in it.

Of course! Feel free to customize the ingredients to suit your taste. Try adding fresh or dried dill.

Use vegan tuna, vegan bread, and vegan ingredients.

Yes, as tuna goes with almost every seasoning.

You can poach it in salted water for 3-4 minutes first (assuming the tuna is in slices 3/4 inch thick). However, it's a shame to cook fresh tuna all the way through when tuna steaks are actually best served medium-rare. Consider grilling them for just a couple of minutes per side, and then serving them like a hamburger.