Sardine and potato gratin


Sardine and potato gratin
For this astonishing gratin, part gratin and part clafoutis, we combine potatoes, cooked shallots and pieces of sardines in oil.
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Last modified on: October 22th 2025
For 4 people, you will need:

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Times for this recipe
Preparation: 30 min.
Cooking: 55 min.
All in all: 1 hour 20 min.
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Step by step recipe


Stage 1 - ⌛ 5 min.
Sardine and potato gratin : Stage 1

Preparing the appareil


Mix 100 g milk, 100 g cream, 2 eggs, salt and pepper in a large bowl.

Mix with a whisk and set aside.

Stage 2 - ⌛ 3 min.
Sardine and potato gratin : Stage 2

Preparing the gratin


Prepare and chop 2 shallots.

Set aside.

Stage 3 - ⌛ 3 min.
Sardine and potato gratin : Stage 3
Remove the sardines from the tins and cut into small pieces (you can remove the bones and tails if you prefer).

Set aside.

Stage 4 - ⌛ 5 min.
Sardine and potato gratin : Stage 4
Cut 800 g cooked potatoes into medium-sized pieces.

Stage 5 - ⌛ 20 min.
Sardine and potato gratin : Stage 5
Brown them to taste in a large frying pan in a little oil, adding salt at the end.

Set aside.

Stage 6 - ⌛ 1 min.
Sardine and potato gratin : Stage 6
In the same pan, pour 3 tablespoons of oil, and when hot, add the shallots.

Season with salt and pepper, and cook for 1 minute, stirring constantly.

Set aside.

Stage 7 - ⌛ 3 min.
Sardine and potato gratin : Stage 7

Assembling the gratin


Preheat oven to 200°C (390°F).

Pour half the potatoes into a buttered gratin dish.

Stage 8 - ⌛ 2 min.
Sardine and potato gratin : Stage 8
Pour over the cooked shallots.

Stage 9 - ⌛ 2 min.
Sardine and potato gratin : Stage 9
Then the sardines.

Stage 10 - ⌛ 2 min.
Sardine and potato gratin : Stage 10
Chopped parsley.

Stage 11 - ⌛ 2 min.
Sardine and potato gratin : Stage 11
And finally, the other half of the potatoes.

Stage 12 - ⌛ 2 min.
Sardine and potato gratin : Stage 12
Pour in the egg mixture, then sprinkle with 50 g grated cheese.

Stage 13 - ⌛ 30 min.
Sardine and potato gratin : Stage 13
Bake at 200°C (390°F) for approximately 30 minutes.
Remarks
You can replace sardines in oil with other fish, fresh, smoked or canned too.
Keeping: A few days in the fridge, protected by cling film.
Source: Home made.
Nutritional information
Proteins (gr)Carbohydrates (gr)Fats (gr)Energy value (in k-calories)Energy value (in k-joules)
Whole recipe50 RDI=20 %170 RDI=20 %60 RDI=9 %1,410 RDI=70 %5,900 RDI: 70 %
Per 100 g4 RDI=2 %10 RDI=1 %4 RDI=1 %120 RDI=6 %490 RDI: 6 %
Per person10 RDI=5 %40 RDI=4 %10 RDI=2 %350 RDI=20 %1,480 RDI: 20 %
The % figures are calculated in relation to the Recommended Dietary Intake , or RDI of 2,000 k-calories (or 8,400 k-joules) per day for a woman
Possible allergens in this recipe: milk, egg, Fish
How much will it cost?
  • For 4 people : 2.30 €
  • Per person : 0.60 €

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Note: Be careful, these prices are only an estimate, you can consult the table of prices by ingredients used for this estimate.
This recipe uses (among others)
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