Equipment
* optional
Ingredients
Barley
- 200 g pearl barley, rinsed and drained
- 15 ml olive oil
- 1 yellow onion, small-diced
- 1 bay leaf
- 700 ml vegetable stock, hot
- 4 g fine sea salt
Roasted Vegetables
- 600 g celery root, peeled and cut into 2 cm cubes
- 250 g cremini mushrooms, halved if large, wiped clean
- 150 g shiitake mushrooms, stems removed, caps halved
- 30 ml olive oil
- 3 g fine sea salt
- 1 g black pepper, freshly cracked
Scallion Vinaigrette
- 60 g scallions, thinly sliced, white and pale green parts
- 45 ml lemon juice
- 15 ml apple cider vinegar
- 10 g dijon mustard
- 5 ml maple syrup
- 60 ml olive oil
- 2 g fine sea salt
- ½ g black pepper, freshly cracked
Garnish
- 15 g flat-leaf parsley, finely chopped, leaves only
- 1 lemon zest, finely grated
- reserved scallion tops
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 513 kcal
- Protein
- 12 g
- Carbohydrates
- 66 g
- Fat
- 26 g
- Fiber
- 13 g
- Zinc
- 2.1 mg
- Water
- 228 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Preheat the oven to 220°C/425°F with a rack in the upper third. Line a rimmed sheet pan with parchment for easy release.
Halve the celery root, cut each half into thick slices, then peel with a sharp knife to remove all the rough outer flesh and roots. Cut the flesh into 2 cm cubes.
Toss the celery root cubes with 15 ml olive oil, 2 g salt, and half the black pepper directly on the prepared sheet pan. Spread in a single layer with space between cubes.
Wipe the cremini and shiitake mushrooms clean with a damp cloth. Halve any mushrooms wider than 3 cm and remove tough shiitake stems. Toss on a second sheet pan with the remaining 15 ml olive oil, 1 g salt, and the rest of the pepper. Spread out without overlapping.
Place the celery root on the upper rack and the mushrooms on the lower rack. Roast the celery root for 35-40 minutes and the mushrooms for 25 minutes, stirring once at the halfway point, until deeply golden with crisp edges.
While the oven works, finely dice the yellow onion and thinly slice the scallions, keeping the white and pale green parts for the vinaigrette and the dark green tops reserved for garnish.
Heat 15 ml olive oil in a medium heavy-bottomed pot over medium heat. Add the diced onion and cook for 3-4 minutes until softened and translucent but not browned.
Add the rinsed barley to the pot with the onions. Stir constantly for 2-3 minutes until the grains smell toasty, look slightly dry, and a few grains begin to darken.
Pour in the hot vegetable stock, add the bay leaf and 4 g salt, and bring to a boil. Reduce to a gentle simmer, cover, and cook for 28-30 minutes until the barley is tender but still pleasantly chewy. Remove from heat and let stand covered for 5 minutes.
While the barley rests, make the vinaigrette. In a mixing bowl, combine the sliced scallion whites and pale greens, lemon juice, apple cider vinegar, dijon mustard, maple syrup, salt, and pepper. Whisk to dissolve the salt.
Slowly drizzle the 60 ml olive oil into the bowl while whisking continuously until the vinaigrette is creamy, pale, and lightly thickened. Taste and adjust salt, acid, or sweetness.
Discard the bay leaf. Fluff the barley with a fork and transfer to a large mixing bowl. Add the roasted celery root and mushrooms along with any pan juices.
Pour about two-thirds of the vinaigrette over the barley and vegetables. Toss gently until evenly coated. Taste and add more dressing, salt, or lemon juice as needed.
Stir in the chopped parsley and lemon zest. Transfer to a serving bowl or platter and scatter the reserved scallion tops on top. Serve warm or at room temperature.
Chef's Notes
- Toasting the dry barley in oil before adding liquid is the single biggest upgrade you can make. It creates a deep, nutty aroma that cold-cooked grains cannot match, and it gives the salad a savory backbone that holds up against the bright vinaigrette.
- Celery root discolors slightly when exposed to air for long periods. If prepping ahead, toss the cubes with a splash of lemon juice to keep them creamy white, though a little oxidation will not affect flavor once roasted.
- For an even heartier salad, stir in 60 g of toasted walnuts or 80 g of roasted chickpeas after tossing. Both add crunch and stay vegan-friendly.
- Make-ahead strategy: cook the barley and roast the vegetables up to 2 days ahead and store separately. Slice the scallions and make the vinaigrette the morning of serving. Combine and dress within an hour of serving for the freshest texture.
- The dressing is intentionally punchy. Barley is mild and can absorb flavor without overwhelming, so do not under-season the vinaigrette out of caution.
Storage
Refrigerator: 4 days — Store undressed barley and roasted vegetables separately from vinaigrette for best texture. Dress just before serving.
Freezer: 1 month — Freeze barley and roasted vegetables only; vinaigrette does not freeze well.
Reheating: Best enjoyed at room temperature. If desired, gently warm in a 160°C/320°F oven for 8 minutes before dressing.
Troubleshooting
Celery root cubes are pale and soft, not caramelized
Cause: Pan was overcrowded, causing the vegetables to steam in their own moisture
Fix: Cannot be fixed once roasted. Next time, increase oven to 230°C/450°F and spread thinner.
Prevention: Use a large sheet pan and spread cubes with at least 1 cm between them; roast on two pans if needed.
Mushrooms are rubbery or watery
Cause: Mushrooms were washed under water and absorbed moisture, or the pan was crowded
Fix: Cannot be fixed once roasted; under-roasted mushrooms can be returned to a 230°C/450°F oven for 5 minutes.
Prevention: Wipe mushrooms clean with a dry or barely damp cloth and keep them in a single layer on the pan.
Barley is gummy or mushy
Cause: Too much liquid or overcooking; pearl barley breaks down with excess stirring
Fix: Spread the cooked barley on a sheet pan to cool and dry out for 10 minutes, then proceed.
Prevention: Measure the stock accurately and avoid lifting the lid during cooking. Stop at 28 minutes to check.
Barley is chalky in the center
Cause: Insufficient cooking time or liquid evaporated before grains softened
Fix: Add 60-120 ml hot stock, cover, and simmer 5-8 minutes more. Test again before draining.
Prevention: Keep the pot covered and at a true gentle simmer, not a hard boil.
Vinaigrette tastes flat or one-dimensional
Cause: Insufficient seasoning or acid balance
Fix: Whisk in additional lemon juice 5 ml at a time, or salt 0.5 g at a time, until the flavor lifts.
Prevention: Taste dressing on its own before dressing the salad; acid should be bright but not sharp.
Salad tastes dry after resting
Cause: Barley and roasted vegetables absorb dressing as they cool
Fix: Add another 15 ml vinaigrette, a squeeze of lemon, and toss. The flavor will return.
Prevention: Reserve some dressing to refresh the salad just before serving.
Cultural Context
Barley is one of the oldest cultivated grains, a staple across the Mediterranean basin from ancient Mesopotamia through modern Italian and Levantine kitchens, where it appears in soups, pilafs, and rustic salads. Celery root, or celeriac, was popularized in Northern European and French bistro cooking from the 17th century onward as a cold-season alternative to celery stalks. This salad draws on both traditions, treating barley like an Italian-style grain base and pairing it with the earthy winter vegetable favored in French country kitchens.
