Name: Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: Mediterranean
Ingredients: 2 large leeks (white and light green parts), halved lengthwise and sliced into 1-inch pieces; 1 large fennel bulb, halved, cored and thinly sliced (fronds reserved for serving); 2-3 tablespoons olive oil, divided; Kosher salt and ground black pepper, to taste; ½ lemon, juiced (about 2 tablespoons); ⅓ cup extra virgin olive oil; 3 tablespoons rice vinegar; 1 clove garlic, finely chopped or grated; ½ lemon, juiced (about 2 tablespoons); 1 tablespoon Dijon mustard (coarse ground preferred); 1 tablespoon honey (or substitute agave or pure maple syrup for vegan); ½ teaspoon garlic powder; Kosher salt and ground black pepper, to taste; 1 cup cooked quinoa (from ⅓ cup dry); 2 big handfuls baby arugula; ½ cup shaved parmesan or crumbled feta; Fennel fronds and finely chopped fresh herbs such as dill or parsley (about ½ cup)

Print Recipe· 3.8 from 10 reviews

If you are looking to brighten up your salad repertoire with a dish that boasts a harmony of textures and vibrant flavors, you have to try this Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe. It combines the gentle sweetness of caramelized leeks and fennel with the peppery kick of fresh arugula, all tied together by a lively, tangy lemon Dijon vinaigrette. Each bite delivers a nourishing, fresh, and satisfying experience that feels both rustic and elegant—perfect for any season or occasion.

Ingredients You’ll Need

The image shows a wooden cutting board on a white marbled surface with fresh cut vegetables and ingredients arranged neatly. On the board, there are chopped pieces of pale green leek, sliced fennel with white and light green layers, a large whole stalk of leek with dark green leaves, and a knife with a white handle resting on some leek pieces. Around the board are small white bowls and jars containing yellow mustard, honey with a wooden honey dipper, olive oil, quinoa, sliced cheese, ground black pepper, salt, garlic cloves on a small plate, fresh bright green dill and parsley herbs, and four whole yellow lemons partially placed in a white mesh bag. The scene has a clean, fresh, and natural look, with the colors mainly green, yellow, and white. photo taken with an iphone --ar 4:5 --v 7

This Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe uses a handful of thoughtfully chosen ingredients that are surprisingly simple yet essential. Each component plays a crucial role in layering flavor, providing texture, and adding that irresistible pop of color to this wholesome salad.

2 large leeks (white and light green parts), halved lengthwise and sliced into 1-inch pieces: These add a mild onion-like sweetness and tender texture once roasted.
1 large fennel bulb, halved, cored and thinly sliced (fronds reserved for serving): Fennel brings a subtle licorice note and crunch that perfectly balances the softer leeks.
2-3 tablespoons olive oil, divided: Essential for roasting and dressing, olive oil enriches flavor and helps caramelize the vegetables.
Kosher salt and ground black pepper: Simple seasonings that enhance every ingredient’s natural taste.
½ lemon, juiced (about 2 tablespoons): Brightens the salad with fresh citrus acidity and elevates the vinaigrette.
⅓ cup extra virgin olive oil: Adds depth and silkiness to the lemon Dijon vinaigrette.
3 tablespoons rice vinegar: Contributes a gentle, slightly sweet tang to the dressing.
1 clove garlic, finely chopped or grated: Infuses the vinaigrette with a subtle, savory bite.
1 tablespoon Dijon mustard (coarse ground preferred): Adds a creamy, pungent kick that rounds out the dressing.
1 tablespoon honey (or agave/maple syrup for vegan): Balances acidity with a touch of sweetness in the vinaigrette.
½ teaspoon garlic powder: Enhances garlic flavor in the dressing without overpowering.
1 cup cooked quinoa (from ⅓ cup dry): Provides hearty texture and protein to keep the salad filling.
2 big handfuls baby arugula: Delivers a peppery freshness that perks up every bite.
½ cup shaved parmesan or crumbled feta: Adds savory richness and a creamy contrast.
Fennel fronds and finely chopped herbs like dill or parsley (about ½ cup): Fresh green accents that brighten the final presentation and flavor profile.

How to Make Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe

Step 1: Prepare and Clean the Leeks

The first step in this Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe sets the stage for flavorful, grit-free vegetables. Start by preheating your oven to 425 degrees F with a rack in the center. Leeks are notorious for trapping dirt between their layers, so give them a good soak in cold water after slicing. This simple trick loosens any grit, making sure every bite is clean and delightful. Once soaked, pat them thoroughly dry to ensure they roast to perfection instead of steaming in the oven.

Step 2: Roast the Leeks

Next, toss the sliced leeks with olive oil, kosher salt, and freshly ground black pepper, then spread them on a sheet pan in an even layer. Pop them into the hot oven for about 15 minutes. Roasting transforms the leeks’ gentle sweetness into a beautifully caramelized flavor that adds incredible depth to our salad.

Step 3: Add the Fennel and Continue Roasting

After the leeks have had their time to soften and caramelize, it’s time to introduce the fennel. Add the thinly sliced fennel to the pan, toss everything together gently, and spread evenly once again. Roast for another 10 to 15 minutes until the leeks are melt-in-your-mouth tender and the fennel has turned a golden hue while still retaining a slight crispness. A squeeze of fresh lemon juice over the warm vegetables brightens and balances their natural sweetness.

Step 4: Make the Lemon Dijon Vinaigrette

While the vegetables roast, whisk together the vibrant vinaigrette that truly pulls this salad together. Combine lemon juice, extra virgin olive oil, rice vinegar, Dijon mustard, honey, finely chopped garlic, garlic powder, salt, and pepper in a bowl or jar. Shake or whisk until smooth and emulsified. The tangy, lightly sweet vinaigrette is the perfect partner to the hearty roasted veggies and fresh arugula.

Step 5: Assemble the Salad

Once vegetables are roasted and vinaigrette ready, it’s time to assemble! In a large bowl, combine the warm leeks and fennel, cooked quinoa, fresh baby arugula, and your choice of shaved parmesan or crumbled feta. Drizzle some of the lemon Dijon vinaigrette over everything and toss gently to coat. Finally, sprinkle fennel fronds and fresh herbs on top for a burst of color and herbaceous aroma. Taste and adjust salt or lemon juice to amplify all the vibrant flavors before serving right away.

How to Serve Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe

The image shows a baking tray filled with roasted vegetable pieces that are light green to white in color. There are two main layers: larger pieces of fennel with long, smooth, white stalks slightly browned at the edges, and smaller square-cut leek sections that are pale green with some browned char marks. The tray itself is green, placed on a white marbled surface. There is a glass with yellow liquid to the left side of the tray and two small bowls partly visible at the bottom edge of the image. The scene is bright and clean. photo taken with an iphone --ar 4:5 --v 7

Garnishes

To take your Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe to the next level, fresh garnishes like fennel fronds and chopped herbs add a lovely visual contrast and fresh herbal brightness. A little extra shaved parmesan or a drizzle of vinaigrette before serving keeps each bite exciting and flavorful.

Side Dishes

This salad stands beautifully on its own but also pairs wonderfully with grilled chicken or fish, roasted salmon, or even a crispy flatbread on the side. Its balance of roasted vegetables and tangy dressing complements simply prepared mains, making it perfect for both casual lunches and elegant dinners.

Creative Ways to Present

For an impressive presentation, serve the salad on a rustic wooden platter to showcase the colorful roasted veggies alongside piles of arugula and quinoa. You can even portion it into individual glass jars or bowls for a picnic or buffet setting. Using vibrant herbs as edible garnish adds a sophisticated touch anyone will love.

Make Ahead and Storage

Storing Leftovers

If you happen to have leftovers of the Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe, store them in an airtight container in the refrigerator for up to 2 days. Keep the dressing separate if possible to maintain freshness and avoid sogginess, then toss everything again just before serving.

Freezing

This salad is best enjoyed fresh, as freezing roasted vegetables and greens typically alters texture and flavor. Quinoa freezes well on its own, but combined with the delicate arugula and vinaigrette, freezing is not recommended for this recipe.

Reheating

If you want to reheat the roasted leeks and fennel for a warm salad variation, gently warm them in a skillet or oven before assembling with fresh arugula. Avoid microwaving the whole salad, as arugula will wilt and the dressing’s brightness may dull.

FAQs

Can I use regular onion instead of leeks?

While you can substitute with onions, leeks offer a milder, more delicate sweetness that complements the fennel beautifully. If using onions, opt for sweet varieties like Vidalia to retain a gentle flavor.

Is this salad suitable for a vegan diet?

Absolutely! Simply swap parmesan with crumbled vegan feta or omit cheese altogether, and replace honey in the vinaigrette with agave or maple syrup for a fully vegan version.

Can I prepare the vinaigrette ahead of time?

Yes, the lemon Dijon vinaigrette keeps well refrigerated for several days. Shake or whisk again before using to reincorporate the ingredients.

What’s the best way to cook quinoa for this salad?

Rinse quinoa before cooking to remove bitterness, then simmer in water or vegetable broth until tender and fluffy. Let it cool before adding to the salad for the best texture.

How do I make sure the leeks and fennel get nicely caramelized?

Spreading the vegetables in a single layer and roasting at a high temperature (425°F) ensures they caramelize instead of steam. Tossing halfway through roasting also helps achieve even browning.

Final Thoughts

This Roasted Leek and Fennel Salad with Arugula and Lemon Dijon Vinaigrette Recipe is a true celebration of fresh, simple ingredients coming together in harmony. Whether you’re looking for a wholesome lunch, a stunning side dish, or a light main, this salad will become a fast favorite that you’ll want to make again and again. Go ahead and give it a try—you’ll love how approachable and delicious it is!