Ingredients

2 pounds cremini or shiitake mushrooms (trimmed), halved if large

4 tablespoons plus 1 teaspoon extra-virgin olive oil

2 teaspoons fresh thyme leaves, plus 4 whole sprigs

Coarse salt and ground pepper

4 firm white-fleshed fish fillets, such as striped bass or cod (6 ounces each)

1/2 cup packed fresh parsley leaves

1 tablespoon fresh lemon juice, plus lemon wedges for serving

Preparation

Preheat oven to 450 degrees. On a rimmed baking sheet, toss mushrooms with 3 tablespoons oil and thyme leaves; season with salt and pepper. Roast until mushrooms are lightly browned, 15 minutes.

Rub fish with 1 tablespoon oil; season with salt and pepper. Arrange fish over mushrooms; top with thyme sprigs. Roast until fish is opaque throughout, 10 to 12 minutes. Toss parsley with lemon juice and 1 teaspoon oil; season with salt and pepper. Serve fish and mushrooms with parsley salad and lemon wedges.