Marinated Saba Kabayaki Fillet. The fish pieces are dipped into a sweet soy sauce-based glaze, called Kabayaki sauce, which is very similar to Teriyaki sauce. Mackerel has an impressive nutrient profile, and it is an exceptional source of omega-3, protein, vitamin D, vitamin B12. Saba Mackerel Fillet can be grill or bake until the skin is golden crispy and delicious flavor. Serve it with steamed rice, miso soup, and a salad, you€š¬‚¬ž¢ll have a lovely Japanese meal for dinner.