Teriyaki Atlantic mackerel fillet is a seafood dish made by marinating fresh mackerel fillets in a sweet and savory teriyaki sauce. The fillets are then grilled, broiled, or baked until tender and caramelized. This dish has a delicate and flavorful taste that pairs well with rice or vegetables. Teriyaki Atlantic mackerel fillet is a popular Japanese cuisine and a healthy source of omega-3 fatty acids.