Peel the potatoes and cut them into thick 5 mm slices. Set aside.
Cut the cauliflower
Wash the cauliflower, break off the florets and cut them into pieces about the same size as the potatoes. Set aside.
Cook the vegetables
Bring 50 cl of salted water to a boil in the saucepan. Add the potatoes and cauliflower florets. Cook for 10 min over medium heat. Drain well.
Tip · To drain without breaking up the vegetables, give the saucepan a gentle shake before tipping it into the colander.
Make the béchamel
Melt the butter in the skillet over low heat. Add the flour and stir for 1 min to make a roux. Add the milk little by little, whisking to avoid lumps. Let it thicken for 5 min over very low heat. Season with salt and pepper.
Assemble the gratin
Arrange the potatoes and cauliflower in the baking dish. Cover with the béchamel. Sprinkle with half the shredded cheese.
Tip · For a crispier gratin, slide it under the broiler for 2 min at the end.
Bake
Bake at 180°C for 15 min. Add the rest of the cheese and bake 5 min more until golden 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 313 kcal. 37% comes from carbs, 19% from protein and 41% from fat.
29 gCarbs
15 gProtein
14 gFat
Per serving (the dish for 2, divided by 2)
Energy
313 kcal
Protein
14.5 g
Carbs
28.8 g
of which sugars
7.2 g
Fat
14.4 g
of which saturated fat
9.7 g
Fiber
5.8 g
Salt
0.6 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 $1.03 a serving, adding up the average prices of the ingredients you need to buy.
≈ $2.06for 2 people
≈ $1.03a 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?
2 days in the fridge, in a closed container, once cooled within two hours. And it freezes really well.
2 daysin the fridge
Very wellin the freezer, thaw it in the fridge the day before