Feb 13, This Roasted Cauliflower and Sweet Potato Recipe is a perfect easy side dish for any dinner. The added rosemary and garlic give it wonderful. A fast and easy side dish, your family will love these sweet and caramelized balsamic roasted sweet potatoes, cauliflower and onions. No white potatoes here! Just sweet potatoes and cauliflower mashed until silky and amped up with milk, butter, and a touch of nutmeg and cayenne.