Peel the potatoes and cut them into small 1.5 cm cubes. Wash the leeks well, remove the dirty root end and any damaged outer leaves, then slice them into 1 cm rounds.
Cook the leeks
Heat the oil in the medium saucepan over medium heat. Add the leeks and cook for 3 min, stirring with the wooden spoon, until they turn translucent.
Add the potatoes
Add the potatoes to the saucepan with the leeks. Stir well, then cover with cold water (about 500 ml). Bring to a boil.
Tip · If the water doesn't cover the vegetables well, add a little hot water so the soup doesn't cool down.
Cook the soup
As soon as the water boils, lower the heat to keep a gentle boil. Cook for 15 min, covered, until the potatoes are tender. Season lightly with salt and pepper.
Make the toasts
While the soup cooks, cut the bread into two thick slices. Toast them dry in the nonstick skillet over medium heat until golden on both sides.
Melt the cheese on the toasts
Take the saucepan off the heat. Spread half the grated cheese over the toasted bread. Slide the toasts under the oven broiler (or into the skillet over low heat) for 2 min to melt the cheese.
Tip · For a more golden cheesy top, you can add a pinch of sweet paprika over the cheese before broiling.
Serve the soup
Drain off a little liquid if needed (the soup should be creamy but not too thin). Ladle it into bowls. Sprinkle the rest of the grated cheese 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 428 kcal. 61% comes from carbs, 15% from protein and 20% from fat.
65 gCarbs
16 gProtein
9 gFat
Per serving (the dish for 2, divided by 2)
Energy
428 kcal
Protein
16.3 g
Carbs
65 g
of which sugars
7.4 g
Fat
9.4 g
of which saturated fat
4.7 g
Fiber
7.2 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 $1.02 a serving, adding up the average prices of the ingredients you need to buy.
≈ $2.05for 2 people
≈ $1.02a 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