Leeks in Mustard Sauce

Total Time

Prep: 15 min. Cook: 20 min.


8 servings

Updated: Sep. 15, 2023
Leeks have a delicious oniony flavor and they are wonderful in this side dish. The mustard sauce compliments the leeks flavor well and it goes well with many main dishes.—Taste of Home Test Kitchen, Greendale, Wisconsin
Leeks in Mustard Sauce Recipe photo by Taste of Home


  • 10 medium leeks (white portion only)
  • 2 green onions with tops, chopped
  • 1 garlic clove, minced
  • 1 tablespoon olive oil
  • 3 large egg yolks
  • 1/4 cup water
  • 2 tablespoons lemon juice
  • 6 tablespoons cold butter
  • 1 tablespoon Dijon mustard
  • Dash white pepper


  1. Cut leeks into 1-1/2-in. slices, then julienne. In a large cast-iron or other heavy skillet, saute leeks, onions and garlic in oil until tender.
  2. Meanwhile, in a small heavy saucepan, whisk the egg yolks, water and lemon juice. Cook and stir over low heat until mixture begins to thicken, bubbles around the edges and reaches 160°, about 20 minutes. Add butter, 1 tablespoon at a time, whisking after each addition until melted. Remove from the heat; stir in mustard and pepper.
  3. Transfer leek mixture to a serving bowl; top with mustard sauce.

Nutrition Facts

1/2 cup with about 4 teaspoons sauce: 185 calories, 13g fat (6g saturated fat), 103mg cholesterol, 160mg sodium, 17g carbohydrate (5g sugars, 2g fiber), 3g protein.

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