Leek Potato Gratin Recipe (2024)

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The best and easy leek potato gratin recipe made with cream, thyme, chives and finished with a layer of mushroom jack cheese.

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Sauteed leeks and paperthin sliced golden potatoes are the star in this comforting vegetarian potato and leek gratin, a dish originated inFrench cuisines that spread all over the world.

I used mymandoline slicer to slice the potatoes so thin you could read themorning paper through them. Then I saute the leeksuntil they start to get some color andlayer all the goodies in a shallow baking dish.

Because a leek potato gratin screams comfort, Iwhisked together some heavy cream with a large egg yolk and chives for a custardy like finish to pour over the top.

Sprinkled with gooey mushroom jack cheese this is what comfort food and chilly winter days are all about. No flour needed.

Leek Potato Gratin Variations:

  • replace the mushroom jack cheese with gruyere
  • finish with a dab of truffle butter or truffle oil
  • replace the leeks with sauteed broccoli or mushrooms
  • add a thin layer of ricotta or goat cheese between the potatoes and veggies
  • make them vegan scalloped potatoes, super delicious, completely dairy-free and good for you!

What to serve with:

  • smoked salmon and dill
  • chimichurri steak
  • garlic roasted chicken
  • grilled chicken
  • chickencarnitas

Leek Potato Gratin Recipe (5)

Leek Potato Gratin Recipe

The best and easy leek potato gratin recipe made with cream, thyme, chives and finished with a layer of mushroom jack cheese.

Print Recipe

Prep Time:15 minutes mins

Cook Time:50 minutes mins

Total Time:1 hour hr 5 minutes mins

Ingredients

  • 1 lb golden potatoes scrubbed well
  • 2 leeks
  • 1/2 tsp sea salt + more to taste
  • 7 oz jack cheese with mushrooms shredded
  • 1 c heavy cream
  • 1 egg yolk large
  • 1/3 c fresh chives snipped
  • 2 tbsp fresh thyme leaves only
  • 1 pinch nutmeg freshly grated
  • 2 tbsp olive oil extra virgin
  • 1/2 tbsp butter

Instructions

  • Preheat your oven to 350”F

  • Slice the leeks lengthwise then slice it crosswise. Add them to a bowl with cold water. Stir to rinse well and allow them to stay in the water for a few minutes. All the grit and dirt will fall to the bottom of the bowl.

  • Use your hands and scoop out the leeks from the water and drain them on a kitchen towel.

  • Preheat a large skillet on medium low flame. Add a lug of olive oil and the leeks with a pinch of sea salt. Saute until wilted and they start to het some color. Adjust seasonings to taste with more sea salt and black pepper. Set aside

  • Using a mandoline thinly slice the potatoes. Sprinkle all over the top with a good pinch of sea salt and black pepper.

  • Use your hand and butter a large gratin dish including the sides. (You can use 2 small gratin dishes if you wish)

  • Layer the thinly slice potatoes on the bottom of the gratin dish overlapping each other. Scoop the sauteed leeks and spread them on top of the potato slices. Sprinkle with the fresh thyme.

  • In a mixing bowl whisk together the heavy cream with the egg yolk, a dash of nutmeg and the chives. Pour over the leeks. Sprinkle with the grated mushroom jack cheese and cover with aluminum foil.

  • Bake the leek potato gratin in the preheated oven for about 45 minutes, remove the foil and cook another 10 minutes or so until the cheese is golden on top.

Course: Side Dishes

Cuisine: French

Servings: 4

Author: Florentina

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  1. Leek Potato Gratin Recipe (15)
    Made this for a special evening with friends and it was amazing! Used a jack cheese blend. Would definitely make it again!

    Reply

  2. LOVE this recipe….making it tonight for the second time!!! I would give it five stars, if it would let me 😉

    Reply

  3. The recipe for the Leek & Potato Gratin does not show up. Would love to get the recipe.

    Reply

    1. Hi Kim, are you still having this issue? I am able to see the recipe both on desktop, phone and Ipad. Please let me know, thanks~ Florentina

      Reply

Leek Potato Gratin Recipe (2024)

FAQs

How do I get the most out of my leeks? ›

I recommend trimming off at least half of the uppermost dark green leek pieces: At the very top, they're pretty leathery and just not that tasty. But the lowest inch or two of dark green pieces - right where the dark green meets the white portion of the vegetable - are much more tender and easier to cook with!

Why does my leek and potato soup taste bland? ›

The reasons are usually two: you didn't season your soup at all, worrying it might be too salty because of the leeks; or you added to much water for the stock.

What is the cooking technique of gratin? ›

Derived from the French verb gratiner — to broil — gratin is a process that involves topping a dish with either cheese or buttery breadcrumbs and baking or broiling until crispy. While potatoes au gratin is most traditional, the contents beneath the golden crust can vary widely.

Why is my au gratin watery? ›

If you stored the sliced potatoes in water to prevent discoloring, but didn't drain them well and pat them dry before adding them to the baking dish, you may have added extra water to the dish. You could have also used the wrong kind of potato, as some waxy potatoes can release more water than starchier potatoes.

How long should leeks be cooked? ›

To cook: Leeks can be boiled, braised or steamed. Sliced leeks should be cooked for 5-7 minutes until tender but still firm. Whole small leeks should be cooked for 10-15 minutes until tender but still firm, top with a cheese sauce and then brown under a preheated grill for 5 minutes or until golden.

Why do you soak leeks in water? ›

However, washing leeks is particularly essential because they get LOTS of dirt and grit stuck in them during the growing process. Fortunately, a quick slice and swish in a bowl of water easily helps all that dirt fall out of your leeks and into the bottom of the bowl.

How deep should a gratin dish be? ›

Butter a gratin dish (which should be long and large and about 5 cm (2 in) deep) and sprinkle 2 chopped garlic slices on the bottom, a pinch of salt and pepper and more nutmeg.

What is the difference between au gratin and gratin? ›

A “gratin” is any dish that is topped with cheese or breadcrumbs mixed with butter, then heated in the oven or under the broiler until brown and crispy, according to The Food Lover's Companion. The term “au gratin” or “gratinée” just refers to anything prepared in that manner.

Why do my au gratin potatoes curdle? ›

The curdling is caused by high heat, which is hard to avoid in an oven.

Why did my au gratin potatoes turn GREY? ›

Once they have been peeled and cut, raw potatoes will turn brown quickly. This process, which is called oxidation, happens because potatoes are a naturally starchy vegetable. And when exposed to oxygen, starches turn gray, brown, or even black. An oxidized potato is completely safe to eat.

How to thicken au gratin potatoes? ›

To thicken scalloped potatoes, keep cooking the sauce a minute or so longer than directed before adding the cheese. This will create a rich, extra-thick sauce.

What is the one trick Michael Symon uses to make perfect scalloped potatoes? ›

Surprisingly, aluminum foil is his secret weapon. After beautifully shingling the potatoes (he's got a genius trick for doing this quickly, too) he covers the dish in foil before hitting the oven.

What is the secret to growing leeks? ›

Quick Guide to Growing Leeks
  1. Plant leeks during the cool weather of early spring and fall. ...
  2. Space leeks 6 inches apart in an area that gets 6 or more hours of sun daily and has nutrient-rich, well-drained soil.
  3. Improve native soil by mixing in several inches of aged compost or other rich organic matter.

How do you trim leeks while growing? ›

Leaves which grow too long can be trimmed back slightly so that they do not rest on the ground. Cut the long dark leaves back by about 5 cm (2 in) in early summer and again in mid summer, and a third time if it is necessary, in early autumn.

How do you grow big fat leeks? ›

Leeks need a sunny, sheltered site with well-drained, well prepared soil with plenty of added manure or fertiliser. To plant the traditional way, make a hole with a dibber, 20cm deep, drop a seedling in and water in. This method, called 'puddling in' will produce large single leeks with well-blanched stems.

Can I freeze leeks? ›

To freeze: Leeks can be frozen! Simply slice and freeze them on a tray, before popping into a sealed container. To defrost: When you take food or drink out of the freezer, it's important to defrost it safely. Don't defrost at room temperature.

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