1. Preheat the oven to 425°F.
2. In a large bowl, stir the Crown Royal® Maple Finished Whiskey, oil, maple syrup, sage, garlic, and chile. Add the sweet potatoes and toss until evenly coated. Arrange the sweet potatoes in an even layer on a half sheet pan and sprinkle generously with salt and pepper.
3. Roast, carefully turning the sweet potatoes once, until the sweet potatoes are browned and tender, about 40 minutes.
4. Transfer the sweet potatoes to a serving platter. Top with the prosciutto, parmesan, and sage leaves.