Arrange the butternut squash and sweet potato pieces on the baking sheet. Drizzle with oil and sprinkle with turmeric, thyme, cumin, and nutmeg.
1 medium butternut squash, 2 large sweet potatoes, 2 tablespoons avocado oil, ½ teaspoon ground turmeric, ½ teaspoon dried thyme, ¼ teaspoon ground cumin, ⅛ teaspoon ground nutmeg