Creamy Mustard Baked Mackerel on a Bed of Onions

Creamy Mustard Baked Mackerel on a Bed of Onions

This delightful recipe transforms mackerel into a tender and juicy dish with a creamy mustard marinade. The addition of soy sauce enriches the fishy aroma, while the combination of creamy and mustard flavors with the crunchy mustard seeds is a delectable treat. Here’s how to make it.


  • Mackerel (1 piece) — 300 g.
  • Onions (2 pieces) — 200 g.
  • Sour cream (15-20% fat) 100 g.
  • Dijon mustard — 1tsp.
  • Whole grain mustard — 1 tsp.
  • Soy sauce (1 tablespoon) — 15 ml.
  • Salt — 0.5 tsp.
  • A pinch of mixed ground pepper
Creamy Mustard Baked Mackerel Ingredients

Cooking Equipment

  • Large mixing bowl
  • Knife and cutting board
  • Baking dish
  • Parchment
  • Oven preheated to 180°C (356°F)

Nutrition Facts for 100 g.

Prep Time15 min.
Cooking Time30 min.
Calories125 csal.
Protein9 g.
Fat8 g.
Carbohydrates4 g.

How to Make Creamy Mustard Baked Mackerel on a Bed of Onions

Step 1. Start by thawing the mackerel if it’s frozen. Make sure to gather all the necessary ingredients.

Step 2. In a large bowl, combine the sour cream, salt, mixed pepper, both types of mustard, and soy sauce. Mix them thoroughly using a whisk.

Step 3. Peel and thinly slice the red onions into half-rings. Add the sliced onions to the marinade and mix well.

Step 4. Remove the heads, tails, and fins from the mackerel. Cut the fish along the belly to remove all the innards, blood, and dark membranes, which can cause bitterness. Cut the mackerel into 1.5-2 cm thick slices, ensuring you remove any bones, which are usually easy to take out.

Step 5. Place the mackerel slices in the marinade with the onions. Ensure they are well coated with the creamy mustard mixture. Leave them to marinate for about 30 minutes.

Step 6. After 15 minutes of marination, preheat your oven to 180°C (356°F).

Step 7. In a baking dish, make a small bascket with parchment. Place there the marinated onions as a base.

Step 8. Put the marinated mackerel slices on top of the onions. Bake the fish and onions in the preheated oven for 30 minutes.

Step 9. Serve: Once baked, your creamy mustard mackerel with onions is ready to be enjoyed. It’s aromatic and delicious, and it can be served hot or cold.

Creamy Mustard Baked Mackerel

Food and Drink Paring

For a delightful food and drink pairing with creamy mustard baked mackerel on a bed of onions, you’ll want to complement the dish’s flavors with options that enhance the overall dining experience. Here are some suggestions:

  1. Side salad
  2. Steamed asparagus
  3. Mashed potatoes
  4. White wine
  5. Sparkling water with lemon
  6. Pale ale or lager
  7. Iced tea
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Feel free to adjust these suggestions to suit your preferences. The goal is to create a harmonious dining experience where the flavors of the mackerel shine while being complemented by the chosen sides and beverages.

Snap. Cook. Share

Thank you for visiting Table Recipes. This dish is a perfect addition to a festive spread. Bon appétit! If you like baked mackerel, please share it with your friends. Be happy everywhere and make everything with love and joy!