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Export 5 ingredients for grocery delivery
Step 1
Preheat the oven to 375 degrees F.
Step 2
Spread the mushrooms in a single layer on a rimmed baking sheet. Drizzle with olive oil and sprinkle with salt and pepper. Toss gently and spread back into a single layer.
Step 3
Roast for 15 minutes. Check the mushrooms. If any liquid has formed on the sheet pan, carefully drain it off. Roast the mushrooms for 5 to 10 more minutes, until browned and tender.
Step 4
Add the arugula to a serving plate. Top with the mushrooms and toss gently. Sprinkle the walnuts over the salad. Garnish with additional olive oil, if desired. Serve warm or at room temperature.