Having never eaten sardine or mackerel I am curious as to how you eat it. Plain?
On crackers, on bread. YOu could also mix it into things same as you would tuna.
You can eat it plain, but it’s a bit dry. I’ll add some mayonaise and sometimes juice out of a jar of jalapenos. But they are great on a cracker with cream cheese, and washed down with a good beer. :)
They can also be used on salads. Or as a tuna fish sandwich but instead of tuna fish. Sardines have a stronger “fishy” taste, which I prefer.
King Oscar Mediterranean Style Mackerel Fillets in olive oil.
Dump the fillet and the oil into a big bowl. Toss with tomatoes, cucumbers, red onion, some olives, a sliced pickled pepper or two, and a splash of red wine vinegar.
Toss gently, then devour!