This cheese leeks recipe is undoubtedly one of the best I’ve ever made. Yes, I said it and I stand by it. The combination of mild, tender leeks with a flavorful and easy cheese sauce is simply irresistible.

When are leeks in season?

Leeks are grown and harvested in the cooler months, with the season typically running from October to May.

Embrace French Technique: Leeks Au Gratin

This “leeks au gratin” recipe is a classic French method and a beloved way to prepare leeks in the U.K. Don’t be fooled by its simplicity – a creamy cheese sauce is infused with secret flavor boosters that elevate the dish without overpowering the delicate leeks in cheese sauce.

What to Serve with Baked Cheesy Leeks

Baked in a creamy cheese sauce and crowned with golden brown, crispy breadcrumbs, leeks transform into a delicious side dish for your roast dinner (think Sunday roasts, beef, chicken, or lamb). Yellow mustard and nutmeg are my secret weapons. These unexpected ingredients play a supporting role, enhancing the overall flavor profile without stealing the spotlight. Both options emphasize the role of mustard and nutmeg while avoiding negativity about not directly tasting them. The sauce starts as a classic white sauce: milk thickened with flour.  I always elevate this base with a touch of nutmeg, introducing a subtle sweetness and depth.  Yellow mustard adds a different and delicious dimension  a delightful complexity, transforming this sauce into a dream pairing for macaroni cheese dish or cauliflower cheese.

One-Pan Cheesy Leeks: A Streamlined Delight

This classic British recipe takes a one-pan approach for ultimate ease.  We start by softening leeks in melted butter over medium heat, keeping them pale without browning. This forms the base for our creamy cheese sauce.  Once the sauce is ready, simply transfer everything to a baking dish and pop it in the oven. If you’re using an oven-safe pan, you’ve got a true one-pan wonder! This dish seamlessly transitions from stovetop to oven for a fuss-free feast. 

Cheese Choice for the Perfect White Sauce

Since we’re building a white sauce, a good white cheddar cheese is best. English cheddar if you can find it because it offers a beautiful creamy white color and a delightful flavor compared to yellow cheddar. Gruyère is another fantastic option, bringing its own unique twist.

Plant-Based Alternatives

Transform this recipe into a vegan version with a few simple swaps! Use your favorite plant-based butter, milk, and cheese alternatives.

Pan Size

You don’t need a large pan/baking dish for this recipe. I used my 8 x 8-inch (20 cm) ceramic baking dish. If you’ve made this British Style Cheesy Leeks, please leave a comment below. You can also ask a question too. I prefer unsalted so I can control the salt level. If you use salted butter, salt to your taste level.

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