Toss: Preheat the oven to 400°F. In a large bowl, toss the sweet potatoes with olive oil, melted butter, kosher salt, garlic, rosemary, thyme, sage, and freshly cracked black pepper. Make sure the sweet potato slices are well coated.
2 1/4 pounds sweet potatoes, peeled & sliced 1/2-inch thick, 2 Tablespoons olive oil, 2 Tablespoon unsalted butter, 2 teaspoons Morton kosher salt*, 6 cloves garlic, minced finely, 1 heaping Tablespoon fresh chopped rosemary, 1 teaspoon dried thyme, 1/2 teaspoon dried sage, fresh cracked black pepper