📌 Potato and Leek Quiche

Posted 28 April 2026 by: Admin #Recipes

Prep Time

35 minutes

Cook Time

35 minutes

Total Time

70 minutes

Servings

4 servings

The smell of leeks melting in olive oil — that sweet, slightly sugary scent starting to fill the kitchen — is the signal that you’ve made the right choice. This quiche doesn’t have a store-bought shortcrust pastry. It has something better: a base of hand-crushed potatoes, crispy on the edges and melting in the center.

Final result — A rustic quiche with melting leeks and a golden potato crust, ready to be shared.

Placed on the table, it looks almost like a classic tart. But the top is different: a light caramel-colored crust of melted emmental, with small golden bubbles where the cheese grilled directly. Underneath, the leek filling is well-set and creamy, with a few green filaments piercing the surface. And when you lift the first slice, you hear the base briefly scrape against the pan — that short, dry sound that says the base held together.

Why you’ll love this recipe

✓Zero dough to buy : The crust is just cooked and flattened potatoes. Cheaper, faster, and frankly better than industrial shortcrust pastry that gets soggy as soon as it touches a moist filling.

✓An unsupervised evening meal : 35 minutes of preparation, half of which the potatoes cook by themselves in their pot. You can do something else during that time.

✓The contrast of textures : The crispy base against the creamy filling with melting leeks — it’s this contrast that makes the dish interesting. Without it, it’s just a soft quiche.

✓It reheats very well : Unlike a quiche on shortcrust pastry that softens in the fridge, the potato base regains some firmness after a stint in the oven the next day.

Ingredient Notes

Ingredients

Everything you need for a generous quiche: starchy potatoes, tender leeks, cream, eggs, and grated emmental.

Potatoes : Choose starchy varieties — Bintje, Monalisa, or Agria. They mash better and stay more compact in the mold. A Charlotte or Nicola will slide everywhere and refuse to form a real crust.
Leek whites : Only the whites, not the green parts. They are more tender, less fibrous, and their flavor is sweeter when cooked. Cut them into 5 mm slices maximum — too thick, and they stay crunchy even after 10 minutes over medium heat.
Heavy cream : Full-fat cream with at least 30% fat. Low-fat cream makes the filling too liquid and the quiche won’t hold up when sliced. No need for luxury cream — the one from the fresh aisle of any supermarket works perfectly.
Grated Emmental : Grate it yourself if you can — freshly grated cheese melts more uniformly and browns better. Pre-shredded pizza cheese contains anti-caking agents that prevent it from forming a real crust.
Nutmeg : A pinch, no more. Its role is subtle: it rounds out the taste of the cream and prevents the filling from being too neutral. If you don’t have any, just skip it rather than replacing it.

Why I always cook potatoes whole with the skin on

The temptation is to peel and cut them into pieces to go faster. Bad idea. Cooked whole with the skin on, they absorb much less water — which is exactly what we want for a base that doesn’t release liquid in the mold after baking. 30 minutes in salted boiling water, covered, over medium heat. To check the doneness, poke a knife into the center: it should go in without resistance, like butter. Too firm, and they won’t mash well. Overcooked, and they release too much moisture. This is the only step that really requires attention.

The part everyone messes up: forming the base

The potatoes are still hot, the mold is buttered — and now, you must act fast. Cut them into slices about 1 cm thick and arrange them in a layer at the bottom and on the sides of the mold. Take a flat-bottomed glass and press down firmly. The goal is to fuse the slices into a continuous surface, without holes or gaps. For the walls, press upward with the glass while slightly tilting the mold. If you are too delicate, you just get a base of slices that separate when cutting — not pretty, not practical. Fingers work as well as the glass for the corners.

Leeks: ten minutes that really matter

In the hot pot with olive oil, the sliced leeks hiss briefly on contact with the metal — that little moist crackle that yields almost immediately. Then they begin to melt, over medium heat, without a lid. After 10 minutes, they have reduced by half, taken on a tender, almost translucent green color, and their texture is silky under the spatula. Don’t try to brown them. Pour them directly into the cream-egg mixture while still hot — it doesn’t matter for the rest of the process.

The filling and baking: what to watch for

Four eggs, 50 cl of cream, salt, pepper, a pinch of nutmeg. Mix with a fork — no need for an electric whisk. Add the leeks, mix one last time, and pour over the potato base. Sprinkle the emmental evenly over the entire surface. Oven at 180°C for 30 to 35 minutes. The quiche is ready when the top is a light caramel color — not pale yellow, not dark brown — and the center no longer jiggles when you lightly shake the mold. Take it out and let it rest for 10 minutes before slicing: the filling finishes setting during this time and the slices hold much better.

Tips & Tricks

If your potato base still seems moist after crushing, slide the mold into the empty oven for 5 minutes before pouring the filling. This slightly dries the surface and prevents it from becoming soggy during baking.
For a zingier version, add a teaspoon of wholegrain mustard to the egg-cream mixture. It completely changes the depth of flavor without overpowering the leeks.
Leftovers keep for 2 days in the fridge. To reheat: 15 minutes at 150°C in the oven, not the microwave — otherwise the base becomes rubbery and loses everything that made it interesting.

Close-up — Melted emmental forms an irresistible crust over the creamy leek filling.

FAQs

Can this quiche be prepared in advance?

Yes, it can be prepared very well the day before. Keep it in the refrigerator covered with plastic wrap and reheat it for 15 minutes at 150°C before serving. The potato base regains some firmness in the oven — avoid the microwave, which makes it rubbery.

What variety of potatoes should I use so the base holds together?

You absolutely need a starchy variety: Bintje, Monalisa, or Agria. Firm-fleshed varieties like Charlotte refuse to bond together, and the base will crumble when sliced. If you can’t find the label, a potato for gratins or mash will do.

Can I replace the heavy cream with something else?

Using thick crème fraîche thinned with a little milk (50/50) works. However, avoid light cream with less than 20% fat: the filling stays too liquid and won’t hold well once cooked.

My potato base collapsed when I sliced it. What happened?

Two possible causes: either the potatoes were overcooked and too watery when mashed, or you didn’t press hard enough when forming the base. You really need to fuse the slices together with the glass, firmly, so they don’t separate after baking.

Can I add other vegetables or ingredients to the filling?

Absolutely. Crumbled goat cheese instead of emmental completely changes the flavor profile. Sautéed spinach integrates well with the leeks. You can also replace emmental with Comté or Gruyère for a stronger flavor.

How long does this quiche keep?

Two days in the refrigerator in an airtight container or covered with film. It also freezes very well in individual portions, wrapped in film and then aluminum foil. Thaw in the refrigerator the day before and reheat in the oven.