Preheat the oven to 400°F. Add the vegetables to the sheet pan, then season with kosher salt, black pepper, dried sage, dried thyme, nutmeg, smoked paprika, and red pepper flakes. Toss with avocado oil. Roast for about 30 minutes while you work on the chicken and the glaze.
½ medium butternut squash, 1 pound brussels sprouts, 1 large honey crisp apple, 1 large red onion, 2 tablespoons avocado oil, 2 teaspoons kosher salt, 1 teaspoon dried sage, 2 teaspoons dried thyme, ¼ teaspoon nutmeg, ¼ teaspoon smoked paprika, ¼ teaspoon red pepper flakes, ¼ teaspoon black pepper