- 7 tablespoons extra-virgin olive oil, divided
- 2 pounds small yellow fingerling potatoes, unpeeled, halved lengthwise
- 4 tablespoons minced shallots, divided
- 1 garlic clove, pressed
- 1 pound large fresh oyster mushrooms, torn into 1-inch-wide strips
- 1 tablespoon chopped fresh Italian parsley
- Position 1 rack in top third and 1 rack in bottom third of oven and preheat to 450°F. Brush 2 large rimmed baking sheets with 1 tablespoon olive oil each. Place potatoes on 1 prepared sheet; drizzle 3 tablespoons olive oil over and toss to coat. Spread potatoes in single layer; sprinkle with salt and pepper. Place potatoes on top rack of oven and roast 10 minutes. Sprinkle 2 tablespoons shallots and garlic over. Transfer potatoes to bottom rack of oven and continue to roast until tender and golden brown, stirring occasionally, about 10 minutes longer. Remove from oven.
- Meanwhile, toss mushrooms on second prepared baking sheet with remaining 2 tablespoons olive oil; sprinkle with salt and pepper. Spread in single layer and roast mushrooms on top rack of oven until golden brown, stirring occasionally, about 15 minutes.
- Add mushrooms to potatoes; stir to combine. do ahead Can be made 2 hours ahead. Let stand at room temperature. Rewarm in 450°F oven until heated through, about 5 minutes, before continuing.
- Add parsley to potato-mushroom mixture and toss; season to taste with salt and pepper and serve.