Description
This Caramelized Leek and Mushroom Gruyère Pasta transforms simple pantry ingredients into a rich, restaurant-worthy dinner. Sweet, slow-cooked leeks and deeply browned mushrooms fold into a silky cream sauce brightened with lemon and balsamic. Tossed with fettuccine and melted Gruyère, then finished with toasted pine nuts, it’s a comforting vegetarian pasta that feels elegant yet effortless.
Ingredients
- Olive oil
- Butter (divided)
- Fresh leeks, trimmed and thinly sliced
- Salt
- Granulated sugar
- Sherry wine
- Oyster mushrooms (or preferred variety)
- Garlic, finely chopped
- Fresh sage leaves
- Heavy cream
- Balsamic vinegar
- Lemon zest
- Fettuccine
- Reserved pasta cooking water
- Freshly grated Gruyère cheese
- Freshly ground black pepper
- Toasted pine nuts
Instructions
- Caramelize the Leeks: Warm the olive oil with most of the butter in a wide sauté pan over medium heat. Add the sliced leeks, then season with salt and a small pinch of sugar to encourage browning. Cook slowly, stirring from time to time, until the leeks turn soft and golden—this should take around 20 minutes. If the pan begins to dry out, splash in a tablespoon or two of water to prevent scorching.
- Deglaze and Set Aside: Pour in the sherry wine and allow it to simmer until mostly reduced. Transfer the caramelized leeks to a bowl and set aside.
- Brown the Mushrooms: In the same pan, melt the remaining butter. Arrange the mushrooms in a single layer without crowding them. Let them sear undisturbed until browned on one side, then flip and cook the other side until golden. Season lightly with salt and pepper.
- Build the Sauce: Stir in the minced garlic and sage, cooking briefly until fragrant. Return the leeks to the pan. Add the heavy cream, balsamic vinegar, and lemon zest. Bring the mixture to a gentle simmer and cook for a few minutes until slightly thickened. Taste and adjust seasoning with additional salt and pepper if needed.
- Cook the Pasta: Meanwhile, boil the fettuccine in generously salted water until al dente. Before draining, reserve some of the cooking water.
- Combine Everything: Add the cooked pasta directly into the sauce along with a portion of the reserved pasta water. Sprinkle in the grated Gruyère and black pepper. Toss thoroughly over low heat until the cheese melts and coats the noodles in a smooth, creamy sauce. Let it simmer briefly to help everything come together.
- Finish and Serve: Divide the pasta among serving bowls and scatter toasted pine nuts over the top for crunch. Serve immediately while warm and creamy.
Notes
- You can swap oyster mushrooms for cremini, white button, chanterelle, or even a mixed mushroom blend depending on availability.
- To prepare in advance, complete the sauce up through the cream step and refrigerate. Reheat gently on the stovetop, then toss with freshly cooked pasta and cheese just before serving.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Dinner