Maple-Soy-Glazed Mackerel Fillets with Avocado
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 17 Jan 2026
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This maple-soy-glazed mackerel fillets with avocado recipe offers a sophisticated balance of rich, oily fish and a vibrant, acidic glaze. Mackerel is a fantastic choice for a quick midweek meal, providing a deep, savoury flavour that stands up beautifully to the sweetness of dark maple syrup and the umami hit of soy sauce. The addition of freshly sliced avocado provides a cooling, creamy contrast to the charred, sticky finish on the fish skins.
As a high-protein dish, this meal is as nutritious as it is delicious, packed with heart-healthy omega-3 fatty acids. It is a wonderful option for those seeking a light yet satisfying dinner that feels truly indulgent. Serve these glazed fillets alongside fluffy steamed rice and a squeeze of fresh lemon to cut through the richness of the glaze for a perfectly balanced plate.
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Ingredients for Maple-Soy-Glazed Mackerel Fillets with Avocado
160ml rice vinegar (not seasoned)
120ml soy sauce
120ml dry Sherry
120ml dark amber or Grade B maple syrup
1 large firm-ripe California avocado
2 teaspoons fresh lemon juice
2 teaspoons extra-virgin olive oil
1/4 teaspoons salt
1/8 teaspoons black pepper
4 (7- to 230g ) Spanish mackerel fillets with skin (about 1/2 inch thick)
Accompaniments: rice
lemon wedges
How to make Maple-Soy-Glazed Mackerel Fillets with Avocado
Briskly simmer vinegar, soy sauce, Sherry, and maple syrup in a 9- to 10-inch heavy skillet over moderately low heat until reduced to about 80ml , 20 to 25 minutes. Keep warm.
Quarter avocado lengthwise, then pit and peel. Cut lengthwise into 1/2-inch-thick slices, then gently toss together with lemon juice, oil, salt, and pepper in a small bowl.
Preheat grill. Line a large (15- by 10-inch) shallow baking pan with foil. 3Reserve about one fourth of glaze in a small bowl.
Arrange fillets, skin sides down, in 1 layer in baking pan. Spoon about one third of remaining glaze over fillet, then spread with back of spoon to coat evenly.
Grill fish 5 to 6 inches from heat, without turning, 2 minutes. Remove pan from grill and coat with another layer of glaze, then grill 2 minutes more. Remove fillets from grill and apply a third coat of glaze, then grill 1 minute more (for a total of 5 minutes). Remove from grill and, with a clean spoon, apply reserved glaze. (Reserved glaze will not have touched uncooked fish.)
Divide avocado salad among 4 plates, then serve fish alongside it.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
17 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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