Roasted Mushroom and Pearl Barley Salad with Thyme
A hearty, nutty grain salad built on tender pearl barley and deeply caramelized roasted mushrooms, brightened with fresh thyme, shallots, and a simple olive oil and vinegar dressing. Earthy, satisfying, and elegant enough for entertaining.
- Prep
- 15 min
- Cook
- 45 min
- Wait
- 10 min
- Total
- 1 hr 10 min
- Makes
- 4 servings (about 1½ cups each)
Steps
Before you start
- Preheat oven to 425 °F (220 °C)
- Bring a large pot of salted water to a boil for the barley
- Line a baking sheet with parchment paper or foil
Cook the barley
- Add the pearl barley to the pot of boiling salted water (aim for a 3:1 water-to-barley ratio).
- Stir once and return to a gentle boil.
- Cook uncovered for 30–35 minutes, stirring occasionally, until tender but still with a slight chew.
- The grains should not be mushy.
- Drain in a fine-mesh strainer and set aside to cool slightly.
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Ready when: Barley is tender but still has a slight bite when chewed
Tip: Don't overcook the barley—it should have texture, not turn to mush. Drain well so excess water doesn't dilute the dressing.
Roast the mushroomsOven 425°F / 220°C
- Toss the cremini and oyster mushrooms with 4 tablespoons (60 ml) olive oil, a generous pinch of salt, and pepper.
- Spread in a single layer on the prepared baking sheet, cut-side down.
- Roast at 425 °F (220 °C) for 20 minutes without stirring, then stir and spread again.
- Continue roasting for 10–15 minutes until the mushrooms are deeply browned and any liquid has evaporated.
- They should smell nutty and caramelized.
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Ready when: Mushroom edges are dark brown or blackened, centers are tender, and any released moisture has evaporated
Tip: Do not stir the mushrooms for the first 20 minutes—this allows the cut side to brown and caramelize. A dry pan produces the best flavor.
Chop the thyme and shallots
- While the mushrooms and barley are cooking, strip the thyme leaves from their stems and roughly chop them.
- Mince the shallots into small pieces, about ¼-inch cubes.
- Set both aside.
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Tip: Mince the shallots finely so they distribute evenly and don't overpower the salad.
Make the vinaigrette
- In a small bowl, whisk together the red wine vinegar, Dijon mustard, minced garlic, and a pinch each of salt and pepper.
- Let it sit for 1 minute so the garlic softens slightly.
- Slowly whisk in the 5 tablespoons (75 ml) of olive oil until emulsified and smooth.
- Taste and adjust seasoning—it should be tangy but balanced.
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Ready when: Vinaigrette is smooth, emulsified, and coats the back of a spoon lightly
Tip: Whisking slowly as you add the oil helps create an emulsion. If it breaks or looks greasy, whisk in 1 teaspoon water to bring it back together.
Combine the salad
- Transfer the cooled barley to a large mixing bowl.
- Add the roasted mushrooms, chopped thyme, and minced shallots.
- Pour the vinaigrette over the mixture and toss gently but thoroughly until all ingredients are evenly coated.
- If using, add the lemon juice and toss again.
- Taste and adjust salt and pepper as needed.
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Ready when: All ingredients are evenly dressed and flavors are balanced
Tip: Toss gently to keep the roasted mushrooms intact and beautiful in the final salad.
Rest and serve
- Let the salad sit at room temperature for 10 minutes to allow the flavors to meld.
- Give it one more gentle toss before serving, or transfer to a serving bowl.
- Serve at room temperature or lightly chilled, depending on preference.
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Ready when: Salad is fragrant and flavors have melded
Tip: This salad actually improves after a few hours as the barley absorbs the dressing. Store covered in the fridge and let it come to room temperature before eating.
Good to know
Tips
- Toast whole thyme sprigs in a dry skillet for 30 seconds before stripping the leaves—this deepens the herb's flavor and makes them easier to remove from the stems.
- Buy mushrooms from a farmers' market or specialty grocer if possible. Fresher mushrooms release less water and caramelize more deeply in the oven.
- If the salad seems dry after sitting in the fridge, drizzle in 1–2 tablespoons more olive oil and a splash of vinegar, then toss gently and let it rest 5 minutes.
- For a heartier dish, top each serving with crumbled goat cheese, toasted nuts (walnuts or hazelnuts), or a poached egg.
Make ahead
You can roast the mushrooms and cook the barley up to 2 days ahead. Store them separately in airtight containers in the refrigerator. The vinaigrette can be made up to 1 week ahead. Assemble the salad no more than 4 hours before serving so the barley doesn't become too soft and the mushrooms stay textured. It actually tastes better the next day.
Storage & reheating
Room temperature: up to 4 hours. Refrigerator: up to 4 days in an airtight container. Freezer: not recommended (barley becomes mushy). To reheat or refresh: let cold salad come to room temperature about 30 minutes before serving, or warm gently in a skillet over medium-low heat for 2–3 minutes. Add a splash of olive oil or vinegar if the salad seems dry.
Substitutions
- oyster mushrooms → King trumpet or shiitake mushrooms. Use the same weight. Shiitakes have a woodsy flavor that pairs beautifully with barley; king trumpets have a meaty texture.
- red wine vinegar → Sherry vinegar or aged balsamic vinegar. Sherry vinegar is mellower and slightly sweet; balsamic adds deeper richness. Use the same amount.
- fresh thyme → Fresh marjoram or oregano. Both herbs have similar intensity. Marjoram is slightly sweeter; oregano is more peppery. Use the same amount.
- pearl barley → Farro or wheat berries. Both have similar cooking times (25–35 minutes). Farro is slightly softer; wheat berries are chewier. Use the same weight.
