Turn the oven on to 180 °C right away, it needs to be nice and hot when the dish goes in. Also fill the saucepan with water and put it on to boil.
Cook the pasta
Salt the boiling water, drop in the 130 g of pasta and cook it 2 minutes less than the package says, since it finishes cooking in the oven. Drain.
Tip · Stop cooking the pasta before it's tender, or it'll be soft after its time in the oven.
Prep the tomatoes
Cut the 200 g of cherry tomatoes in half. Wash the basil and pick the leaves, then thinly slice half of them.
Drain the tuna
Open the 2 cans of water-packed tuna, drain them well and flake the meat into a bowl with a fork.
Tip · Press the tuna well in the colander or with the can lid, or the water will make the gratin soggy.
Make the sauce
In the mixing bowl, mix the crème fraîche, 6 cl of low-fat milk, salt and pepper. Add the sliced basil.
Assemble the gratin
Oil the dish with 1 tablespoon of olive oil. In the mixing bowl, toss the pasta, tuna, tomatoes and sauce, then pour it all into the dish.
Add the cheese
Sprinkle all 40 g of shredded cheese over the top. Drizzle with the 2nd tablespoon of olive oil.
Bake until golden
Bake at 180 °C until the top is golden and the edges are bubbling. Take the dish out and scatter the rest of the whole basil leaves on top.
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 856 kcal. 34% comes from carbs, 27% from protein and 38% from fat.
72 gCarbs
57 gProtein
37 gFat
Per serving (the dish for 2, divided by 2)
Energy
856 kcal
Protein
57 g
Carbs
71.8 g
of which sugars
24.1 g
Fat
36.6 g
of which saturated fat
15 g
Fiber
3.6 g
Salt
1.3 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 $4.28 a serving, adding up the average prices of the ingredients you need to buy.
≈ $8.56for 2 people
≈ $4.28a 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