Fennel and Leek Soup with Gruyère Croutons Recipe | Sur La Table (2024)

By Tested and perfected in the Sur La Table kitchen

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Serves

Makes 6 servings

Ingredients

  • 2 tablespoons olive oil
  • 6 medium leeks, white parts only, cut in half lengthwise, washed and thinly sliced
  • 4 medium fennel bulbs, fronds removed (and reserved) and thinly sliced
  • 2 medium garlic cloves, chopped
  • 2 medium potatoes, peeled and roughly chopped
  • 4 cups chicken or vegetable broth, low-sodium
  • ¾ cup whipping cream
  • Kosher salt and freshly ground black pepper
  • 1 tablespoon lemon juice, to taste
  • 2 tablespoons unsalted butter

  • 12 baguette slices
  • ½ cup grated Gruyère cheese
  • 1 teaspoon minced thyme
  • Kosher salt and freshly ground black pepper
  • 2 tablespoons minced fennel fronds, to garnish

Procedure

This simple yet hearty soup gains texture and flavor with the addition of potatoes. Creamy, rich and flavorful, this soup is accentuated with the addition of savory gruyère croutons.

Place a large saucepan on the stove over a moderate-high heat, add oil and when shimmering, add leeks and fennel and cook until tender, about 8 minutes. Add the garlic and cook until fragrant, about 1 minute. Stir in the potatoes and broth and bring to a boil. Reduce the heat to medium and simmer the soup until the vegetables are fork tender, about 25 minutes.

Using an immersion blender, or working in batches using a food processor, puree the mixture until smooth. Add the cream and return to the stove and bring back to a boil. Add the lemon juice and taste and season with salt and pepper.

To prepare croutons: Preheat a broiler. Using an offset spatula spread the butter on 1 side of each slice of baguette. Arrange the bread, buttered side up, on a baking sheet. Sprinkle with cheese, thyme and salt and pepper. Transfer the baking sheet under the broiler until the cheese melts, about 1 minute. Do not leave broiler unattended. Once cool, cut bread into bite-size croutons.

To serve: Ladle the soup into warmed soup bowls and garnish with minced fennel fronds. Serve immediately with Gruyère croutons.

By Tested and perfected in the Sur La Table kitchen

Serves

Makes 6 servings

Ingredients

  • 2 tablespoons olive oil
  • 6 medium leeks, white parts only, cut in half lengthwise, washed and thinly sliced
  • 4 medium fennel bulbs, fronds removed (and reserved) and thinly sliced
  • 2 medium garlic cloves, chopped
  • 2 medium potatoes, peeled and roughly chopped
  • 4 cups chicken or vegetable broth, low-sodium
  • ¾ cup whipping cream
  • Kosher salt and freshly ground black pepper
  • 1 tablespoon lemon juice, to taste
  • 2 tablespoons unsalted butter

  • 12 baguette slices
  • ½ cup grated Gruyère cheese
  • 1 teaspoon minced thyme
  • Kosher salt and freshly ground black pepper
  • 2 tablespoons minced fennel fronds, to garnish

Procedure

This simple yet hearty soup gains texture and flavor with the addition of potatoes. Creamy, rich and flavorful, this soup is accentuated with the addition of savory gruyère croutons.

Place a large saucepan on the stove over a moderate-high heat, add oil and when shimmering, add leeks and fennel and cook until tender, about 8 minutes. Add the garlic and cook until fragrant, about 1 minute. Stir in the potatoes and broth and bring to a boil. Reduce the heat to medium and simmer the soup until the vegetables are fork tender, about 25 minutes.

Using an immersion blender, or working in batches using a food processor, puree the mixture until smooth. Add the cream and return to the stove and bring back to a boil. Add the lemon juice and taste and season with salt and pepper.

To prepare croutons: Preheat a broiler. Using an offset spatula spread the butter on 1 side of each slice of baguette. Arrange the bread, buttered side up, on a baking sheet. Sprinkle with cheese, thyme and salt and pepper. Transfer the baking sheet under the broiler until the cheese melts, about 1 minute. Do not leave broiler unattended. Once cool, cut bread into bite-size croutons.

To serve: Ladle the soup into warmed soup bowls and garnish with minced fennel fronds. Serve immediately with Gruyère croutons.

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Fennel and Leek Soup with Gruyère Croutons Recipe | Sur La Table (2024)

FAQs

Should leeks be sauteed before adding to soup? ›

Sautéing leeks before adding them to the soup can enhance their flavor and bring out their sweetness. Heat some oil or butter in a pan, then add the sliced leeks. Cook them over medium heat until they become soft and slightly caramelized. This step adds depth of flavor to your soup.

Why is my leek and potato soup bland? ›

Although leeks are known for its powerful taste, your potato and leek soup can occasionally come out 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 to make leek and potato soup Mary Berry? ›

Mary Berry's Potato Leek Soup
  1. Melt butter in a large saucepan over medium heat. Add leeks, and cook, covered, stirring often, until softened, 4 to 6 minutes. ...
  2. Stir in broth, salt and pepper. ...
  3. Carefully transfer soup to a blender. ...
  4. Ladle soup into individual bowls.
Nov 27, 2016

Why is my potato leek soup gummy? ›

Why is my potato leek soup gummy? Potatoes should be diced in similar size so they cook evenly, but don't drive yourself crazy getting them teeny-tiny. If they're too small, you risk the potatoes releasing too much starch, which can make the soup gummy when pureed.

What does leeks do for your body? ›

Leeks are also a good source of folate, a B-vitamin that's essential for cell growth and development. In addition to vitamins and minerals, leeks are also high in fibre. This can help to keep your digestive system healthy and may reduce the risk of constipation, heart disease, and certain types of cancer.

What spices to add to bland soup? ›

"Ground paprika, turmeric, nutmeg, ground ginger, and other powdered spices add a touch of color and spiciness to broths," she says. As a general rule, use fresh herbs at or near the end of cooking and dried herbs and spices early on. This helps you get the flavors you're looking for in the right balance.

How do you thicken leek soup? ›

Add flour or cornflour

Put a tablespoon of either into a small bowl and stir in 2-3 tbsp of the soup until you have a smooth mixture. Stir this back into the soup and bring it to a simmer. Cook for a few minutes to allow the starch granules to burst to thicken, and to cook out any flour flavour.

How can I improve the taste of my soup? ›

Use fresh vegetables, high-quality meats or broth, and fresh herbs to add depth of flavor. Add acidity: A squeeze of lemon or lime juice, a dash of vinegar, or a splash of wine can brighten the flavors of a soup and make it taste more complex.

What does adding potato to soup do? ›

Russets or all-purpose baking potatoes are high in starch and low in moisture. In soups, they will soak up the liquid and lose their shape. This makes them the ideal choice for making creamy soups or thickening a runny soup.

Why does my leek and potato soup taste bitter? ›

Add the leeks to the pot, lowering the heat if necessary and saute for 10-15 minutes , or until soft and translucent. Be careful not to burn the leeks, as they will impart a bitter taste to the soup. The excess liquid from cleaning the leeks should help prevent any burning.

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.

Should I cook potatoes before adding to soup? ›

There's no correct way but some methods provide difference outcomes. I normally dice my potatoes quite small, boil them on their own and add to the soup at the end. That way they are perfectly cooked. On the other hand you can add them with other vegetables and the potatoes will begin to crumble once they are cooked.

How do you fix gluey potato leek soup? ›

It turns out, then, that contrary to internet opinion, it is possible to redeem your potato leek soup if somehow it becomes gluey. Ladle some into a freezer bag, freeze it flat, thaw it, and pour off the water.

How do you make potato and leek soup less salty? ›

In addition to potatoes, you can use other starchy vegetables like carrots or parsnips to absorb excess salt. Dairy products like milk, cream, yogurt, or sour cream can help balance out the saltiness of a soup or stew.

How do you add leeks to stock? ›

Place the leeks in a stockpot with the wine, thyme, peppercorns, salt and 7 cups of water. Bring the liquid to a boil over high heat, reduce the heat and simmer, partially covered, for 25 minutes. Remove from the heat and let the broth stand 10 minutes.

How much of a leek do you use for soup? ›

You'll be using the white and light green parts only. Can I use the green part of leeks in soup? The darker green parts of leeks are bitter and have a tougher texture. They are edible, but we're only using the tender and mild portion of the stalk for this recipe.

Can you use the dark green part of leeks in soup? ›

Never discard your dark green leek tops. They are equally as cookable as the rest, and in most cases can be included alongside the tender base. But should you find yourself with some leftover tops, here is humble and comforting recipe.

Should you saute or roast vegetables for soup? ›

Veggies for soup should be sautéed as its quicker than roasting and far easier to control the cooking point, whether you just want to soften or even caramelise. Don't use olive oil unless you need that flavour, use rapeseed oil which is far healthier than olive, Scottish rapeseed oil is best.

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