Leek and Tomato Gratin Recipe (2024)

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Cooking Notes

DNcgo

Added a few sprig of fresh thyme and 2 bay leaves to the mixture. When done, I topped with grated gruyere cheese and placed under broiler to lightly brown. Served with crusty bread to "maximize" the juices.

Jacqueline

Yes yes yes. This was so lovely, comforting, and refreshing. I was rushed a bit to get dinner on the table and cooked this at 450 for 30 minutes and it was delicious and a bit crispy - so you can speed it up if necessary. I look forward to trying it again soon as the recipe is written.

Tommi-Grace

This was a hit! Complex and comforting flavors. I had to bake for closer to two hours, but it's definitely important to keep checking and stirring.

Jane

Enjoyed this recipe... Used LARGE (older) leeks and cut in "quarters", as suggested. Quite fine! Think I "baked" them about 70 minutes. Still a bit "stringy"; but, a sharp knife "does the trick". VERY FINE! Thank you... always looking for leek recipes!!

Prairiedogg

Cooked on Aug 11, 2020, cleaning out fridge, 2 large leeks quartered lengthwise 2 large tomatoes sliced 3 small zucchini, quartered lengthwise Didn't measure the olive oil - glug, glug salt, pepper baked 350, covered with foil oh, what about the 4 oz of mushrooms sautéed in oil, added to pan then raised to 400, uncovered about an hour total plenty good

KB

Delicious, simple, and comforting.

Ruth from Rego Park, Queens

I know what "preferably slender" means for a human being, or a cat -- but a leek? I don't have a clue! I'll cut them to the size of a fat scallion, & hope it's ok. And about that "gratin dish long enough to hold the leeks but narrow enough so that everything is snug." Would a slender gratin dish work as well? Truth be told, I don't even know what a gratin dish is, but I do have an oblong casserole... not too little, not too big. Do you think the leeks & tomatoes will be sad, or upset?

Carina

Hm. Flavor is OK, but we followed the recipe to a T and still had tough leeks. If we try it again we’ll cook the leeks briefly in water and see whether that helps.

tramy

This was good-not fabulous- but easy to make. Used about a pound of small tomatoes and ended up added a can of chopped tomatoes (drained) because a pound was not enough, chopped the leaks cross wise vs length wise so they cooked faster. Used parmesan fresh mozzarella and goat cheese. Baked it at 400 because I got a late start. Served with toasted bread. Husband thought it was ok

Lamb

Added fresh basil to the mix. After a half hour of cooking, added bread crumbs to sop up some of the liquid. There was a lot! Then at about 8 minutes from done cracked 3 eggs on top it, put the Parm on and turned it up to 400. Eggs weren’t quite done so I popped in the broiler for a minute. Was wonderful but would have been soup without the adjustments.

MariaS

I made this using regular round summer tomatoes- very flavorful but also filled with liquid. I didn't have roma tomatoes so used what I had. It was really delicioius, but there was definitely too much liquid. I think next time I'd drain the liquid from the standard tomatoes. I didn't have super large leeks so I added some lovely scallions. They're similar to leeks but helped fill the baking dish. I also topped it at the end with both mozzarella and parmesan. Bubbled and browned, it was great!

taylor w

Honestly such a simple and delicious recipe. I left it in for 80 minutes and I’d say the longer it’s in the better. I only had feta in the house so added feta at the end and mixed it in and it was amazing!!!!

Naomi

This was lovely. I can see doing so many variations... adding balsamic reduction and goat cheese to the finished bake, or goat cheese and parmesan towards the end and raise the heat, or adding lemon and basil to finish... so many possibilities, but also delicious as written. A very good one to have in my back pocket!

Prairiedogg

Cooked on Aug 11, 2020, cleaning out fridge, 2 large leeks quartered lengthwise 2 large tomatoes sliced 3 small zucchini, quartered lengthwise Didn't measure the olive oil - glug, glug salt, pepper baked 350, covered with foil oh, what about the 4 oz of mushrooms sautéed in oil, added to pan then raised to 400, uncovered about an hour total plenty good

hazelfield

Whole canned tomatoes, especially in winter months, work very well. A touch of oregano red pepper flakes adds character.

Anne

I liked this. Next time I cook it, I will slice the leeks cross wise. I think they will be easier to serve. I also might add some spices to the tomatoes as someone else recommended.

Harmon

Delicious and simple. Cook at 350 for the hour to avoid burning tips.Cut leeks across stem in bite size pieces to make it easier to eat.

Lauren

My CSA sent me leeks and tomatoes this week so I tried this recipe. I topped it with a grated Italian cheese blend and it was delicious. Served with crusty bread and roasted chicken.

Jacqueline

Yes yes yes. This was so lovely, comforting, and refreshing. I was rushed a bit to get dinner on the table and cooked this at 450 for 30 minutes and it was delicious and a bit crispy - so you can speed it up if necessary. I look forward to trying it again soon as the recipe is written.

Jane

Enjoyed this recipe... Used LARGE (older) leeks and cut in "quarters", as suggested. Quite fine! Think I "baked" them about 70 minutes. Still a bit "stringy"; but, a sharp knife "does the trick". VERY FINE! Thank you... always looking for leek recipes!!

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Leek and Tomato Gratin Recipe (2024)

FAQs

Why should the potato slices for the gratin not be soaked in water before adding to the cream? ›

I don't recommend soaking the potatoes in water ahead of time for our potatoes au gratin (as some recipes call for). Soaking them will cause them to lose some of their starch, which helps to keep this dish creamy.

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.

How do you sweat down leeks? ›

Melt the butter in a medium-sized (8ins) heavy-base saucepan, then add the leeks and place the cartouche of top of them. Put the lid on the saucepan and turn heat to the lowest level. The leeks should gently absorb the butter, and soften but not burn. After 20 minutes add a twist of black pepper and serve.

What is the difference between gratin and dauphinoise? ›

Potatoes au gratin are slices of pre-cooked (usually boiled) potato cooked in cream and topped with cheese which makes the gratin. Gratin Dauphinoise, on the other hand, is a dish made of thinly-sliced (not pre-cooked) potatoes that cook in cream. Dauphinoise traditionally does not contain any cheese.

What is the cooking technique used in 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.

Why is my potato leek soup gummy? ›

Potatoes are delicate in that they can be over mashed and over blended. This causes their starches to be released and turn into a gluey, gummy mess. Blend until just smooth, then stop.

Why do leeks upset my stomach? ›

Onions, artichokes, garlic and leeks all contain fructans – carbs that can cause gas and bloating.

Does leek and potato soup make you gassy? ›

Leeks contain fructans, a type of FODMAP that may cause digestive problems in sensitive individuals. If you consume too many leeks or other FODMAP-rich foods, undigested fructans may travel to your colon, where they are fermented by gut bacteria, leading to the production of gas and bloating.

When should you not eat leeks? ›

Avoid leeks with cuts or bruises. The dark green tops of leeks should look fresh. Avoid leeks with yellowing or wilting tops. Choose smaller, younger leeks when you want to eat them uncooked.

How does Gordon Ramsay cook leeks? ›

Season leeks with soy, maple, sesame oil, and mirin. Top with sliced garlic and a few knobs of butter around the outside of the pan. Add just enough stock to cover leeks halfway, bring to a boil and pop into over to roast until caramelized and tender when pierced with a knife.

What flavors pair well with leeks? ›

Uses & Flavour Pairings:

They pair beautifully with dairy products, especially butter, cream, and cheese, as well as with herbs like thyme and tarragon.

What does soaking potato slices in water do? ›

Soaking potatoes in water helps remove excess starch. Excess starch can inhibit the potatoes from cooking evenly as well as creating a gummy or sticky texture on the outside of your potatoes. Cold water is used because hot water would react with the starch activating it, making it harder to separate from the potatoes.

What will happen to potato slices soaked in salt water? ›

– When the potato is put into the distilled water, it will absorb the water. The water is trying to dilute the salt inside the potato. – When the potato is put into salty water, it will lose water. The water in the potato moves towards the salty water to try to dilute it.

Should potatoes be soaked before baking? ›

Then cover the potatoes completely with cold water and let them soak for at least 30 minutes (or up to overnight). This will help to rinse off the excess starch and help the potatoes crisp up beautifully in the oven.

Why do we soak potatoes after you slice them? ›

"Placing [peeled and cut] potatoes in water helps prevent oxidation, which turns their exposed flesh brown," says Ronna Welsh, the author of The Nimble Cook and the owner and chef instructor at Purple Kale Kitchenworks in Brooklyn, N.Y. While oxidation won't make the potatoes unsafe to eat, it does change their flavor.

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