Oven-Baked Whole Mackerel (Full Detailed Recipe)

This oven-baked whole mackerel is simple, nutritious, and packed with flavor. It’s rich in omega-3 fats, naturally low-carb, and perfect for a healthy lunch or dinner.

 Time & Yield

• Prep time: 10 minutes
• Cook time: 25–30 minutes
• Total time: ~40 minutes
• Serves: 2

 Ingredients

• 2 whole mackerel, cleaned and gutted (about 300–400 g each)
• 2 tbsp olive oil
• 1 lemon, sliced
• 3 cloves garlic, thinly sliced
• 1 small onion, sliced
• 1 tsp salt (or to taste)
• ½ tsp black pepper
• 1 tsp paprika (smoked or sweet)
• ½ tsp ground cumin (optional)
• ½ tsp dried oregano or thyme
• 1–2 tbsp fresh parsley or coriander, chopped
• Optional vegetables: sliced tomatoes, zucchini, or bell peppers

 Instructions

1. Preheat oven
   Preheat your oven to 200°C (400°F).
2. Prepare the fish
   • Rinse mackerel under cold water and pat dry.
   • Make 2–3 diagonal slashes on each side of the fish (helps even cooking and flavor absorption).
3. Season
   • Rub the fish inside and out with olive oil.
   • Season with salt, pepper, paprika, cumin, and oregano.
   • Insert lemon slices and garlic into the cavity of each fish.
4. Assemble tray
   • Line a baking tray with parchment paper or lightly oil it.
   • Spread onion slices (and optional vegetables) on the tray.
   • Place the fish on top.
   • Add extra lemon slices on top.
5. Bake
   • Bake uncovered for 25–30 minutes, until the flesh is opaque and flakes easily with a fork.
   • Optional: Broil for the last 2–3 minutes for crispy skin.
6. Finish & serve
   • Sprinkle with fresh parsley or coriander.
   • Serve hot with lemon wedges.

 Serving Suggestions

• With steamed vegetables or roasted potatoes
• Alongside a green salad or Mediterranean cucumber salad
• With brown rice or quinoa for a complete meal

 Nut & Allergen Information

• Nut-free (unless served with nut-based sides)
• Contains fish (mackerel)
• Naturally gluten-free, dairy-free, and low-carb

 Nutrition (Approx. per serving)

• Calories: ~320 kcal
• Protein: ~30 g
• Fat: ~22 g (high in omega-3)
• Carbohydrates: ~3 g

 Q & A

Q: Can I use frozen mackerel?
Yes. Fully thaw and pat dry before seasoning.

Q: How do I know it’s cooked?
The flesh should be opaque and flake easily; internal temp ~63°C (145°F).

Q: Can I add spices?
Absolutely—chili flakes, turmeric, or garlic powder work well.

Q: How to reduce fishy smell?
Use fresh fish, lemon, garlic, and bake uncovered with herbs.

• Author
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Sara Mitchell

Sara Mitchell is an expert restaurant content creator who writes easy-to-read guides about CAVA and other Mediterranean fast-casual chains in the United States. She covers locations, menus, prices, and hours, making it simple for visitors to find nearby restaurants and what to order quickly.

With years of experience in restaurant research and local SEO, Sara creates accurate, user-friendly guides that work for both people and search engines. Her goal is to help users go from search results to their nearest restaurant or menu choice with as few clicks as possible.

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