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a classic that works

Creamy potato and tuna gratin

An everyday dish for 2, ready in 35 minutes, around $2.77 a serving. People actually plan it with Popotam, and it's in season in October.

35mintotal
≈ $2.77a serving
780kcalper serving
30gof protein
In season in OctoberFreezes well
Let's cook
Creamy potato and tuna gratin, a serving idea
AI-generated image · Serving idea

Step-by-step recipe

check things off as you go

  1. Peel the potatoes

    Peel the 500 g of potatoes and cut them into thin rounds, about 2 mm thick.

  2. Cook the potatoes

    Boil the potato rounds in the saucepan of salted water for 5 minutes. Then drain them.

    Tip · For super even potato rounds, use a mandoline if you have one.

  3. Sauté the onion

    Slice the onion and sauté it in the skillet with 1 tablespoon of olive oil over medium heat until translucent.

  4. Add the tuna

    Drain the tuna from the cans, roughly flake it and add it to the skillet with the onions. Mix well.

  5. Stir in the cream

    Add the crème fraîche to the skillet, stir and let it simmer over low heat for 3 minutes. Season lightly with salt and pepper.

  6. Build the gratin

    In the baking dish, spread half the cooked potatoes, then pour in half the creamy tuna and onion mix. Repeat with the rest.

    Tip · Serve this gratin with a green salad to balance out the meal.

  7. Sprinkle on the cheese

    Sprinkle the top of the gratin with the 40 g of shredded cheese and a pinch of nutmeg. Drizzle with the rest of the olive oil.

  8. Bake the gratin

    Put the dish in the oven, preheated to 180°C (thermostat 6), for 15 minutes, until the top is nicely browned.

And there you go, it's readyCheck off every step to celebrate.

The questions you're asking

short answers, numbers you can check

How many calories in a serving?

One serving has about 780 kcal. 23% comes from carbs, 15% from protein and 59% from fat.

45 gCarbs
30 gProtein
51 gFat
Per serving (the dish for 2, divided by 2)
Energy780 kcal
Protein29.6 g
Carbs45.2 g
of which sugars3.4 g
Fat51.3 g
of which saturated fat25.8 g
Fiber8.4 g
Salt0.7 g

Worked out ingredient by ingredient with the ANSES Ciqual 2025 table, never written by an AI. It's an estimate: veggie sizes and brands make the numbers vary.

How much does it cost?

About $2.77 a serving, adding up the average prices of the ingredients you need to buy.

≈ $5.54for 2 people
≈ $2.77a serving

Pantry salt, oil and spices aren't counted. Your store and your brands will move the total, but the ballpark is right.

How long does it keep?

1 day in the fridge, in a closed container, once cooled within two hours. After that, into the freezer it goes.

1 dayin the fridge
Yesin the freezer, thaw it in the fridge the day before

Times Popotam uses for meal prep, based on ANSES guidance, rounded down. The details: how long cooked dishes keep.

and the rest of the week?

Popotam plans your whole week

Lunch and dinner, with dishes like this one, based on your tastes, your time and your budget. The grocery list is sorted by aisle. Free, no account.

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With the same ingredients

potatoes, canned tuna in water, crème fraîche…