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4 x 275 g (10oz) fresh whole mackerel, gutted and heads removed
Zest and juice of 1 large orange (set aside the orange halves)
- 2 Tbsp.
olive oil
4tbsp fresh white breadcrumbs
For the horseradish butter
- 25 g
(1oz) unsalted butter, softened
- 3 Tbsp.
hot horseradish sauce
1½tbsp chopped fresh chives
- 2 Tbsp.
chopped flat-leafed parsley
- Step 1
Beat together all the ingredients for the horseradish butter in a small bowl. Put on a small piece of greaseproof paper, roll the paper to form a sausage, then fold up each end to secure. Freeze for 10min to firm up.
- Step 2
Preheat the oven to 200ºC (180ºC fan) mark 6. Pat the fish dry with kitchen paper and put on a lipped baking sheet, well spaced out. Roughly chop what's left of the orange, then scatter over the fish. Make three diagonal cuts, about 2.5cm (1in) deep, along the top of each fish.
- Step 3
Whisk together the orange juice and olive oil. Mix together the breadcrumbs and orange zest, and season with salt and pepper. Brush the fish with the orange juice and oil, then sprinkle over the breadcrumbs. Cook for 20min or until the fish is golden and the flesh flakes easily.
- Step 4
Top each mackerel with a slice of horseradish butter and serve immediately. Serve with: baked sweet potatoes and steamed vegetables, such as broad beans and peas.
Per Serving:
- Calories: 424
- Total carbs: 10 g
- Total fat: 32 g
- Saturated fat: 8 g

An experienced and highly skilled team of food writers, stylists and digital content producers, the Good Housekeeping Cookery Team is a close-knit squad of food obsessives. Cookery Editor Emma Franklin is our resident chilli obsessive and barbecue expert, who spends an inordinate amount of time on holidays poking round the local supermarkets seeking out new and exciting foods. Senior Cookery Writer Alice Shields is a former pastry chef and baking fanatic who loves making bread and would have peanut butter with everything if she could. Her favourite carb is pasta, and our vibrant green spaghetti is her weeknight go-to. Lover of all things savoury, Senior Cookery Writer Grace Evans can be found eating crispy corn and nocellara olives at every opportunity, and will take the cheeseboard over dessert any time (though she cannot resist a slice of tres leches cake). With a wealth of professional kitchen know-how, culinary training and years of experience between them, they are all dedicated to ensuring every Good Housekeeping recipe is the best it can be, so you can trust they’ll work (and if they don’t – we’ll have the answer for why*) every time (*90% of the time the answer is: “buy an separate oven thermometer”!).
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