Use this side dish to accompany our Rolled Butterfield Leg of Lamb with Herbs and Preserved Lemons.
Preheat oven to 400 degrees.Toss together fennel, oil, thyme leaves and sprigs, 1/2 teaspoon salt, and the pepper in a large bowl. Spread fennel mixture into a single layer on a rimmed baking sheet. Roast fennel, turning occasionally, until browned, 50 to 60 minutes. Drizzle with lemon juice; season with salt.