Preheat the oven to 450°F, 230°C or gas mark 8.
Slice the sweet potatoes into one-inch rounds, place into a mixing bowl. Add salt, pepper, and olive oil. Toss to evenly coat the potatoes.
3 pounds sweet potatoes, ½ teaspoon ground black pepper, ½ teaspoon salt, 2 tablespoons avocado oil
Place on a baking sheet and roast for 15 minutes. Then flip over and roast for another 15 minutes.
Add the chicken broth, thyme, and 2 tablespoons of the melted butter roast for 15 minutes and then gently flip them over for a final time. Cook for 15 more minutes and remove from the oven.
1½ cups chicken broth, ¼ cup butter, 1 tablespoon thyme
While the potatoes are cooking, in a pan combine the remaining butter, maple syrup, cinnamon, and nutmeg. Bring to a boil and then remove from the heat. Add the walnuts.
¼ cup maple syrup, ¼ cup butter, ½ teaspoon cinnamon, ½ teaspoon nutmeg, ¼ cup walnuts
Place the potatoes into a swerving dish and then pour the maple syrup over the potatoes.