Ultimate Cauliflower Gratin Serves 8 This layered gratin is a great side dish for grilled meats, poultry or seafood. One head cauliflower, cut into small florets Salt and pepper 2 tablespoons unsalted butter 1 tablespoon extra virgin olive oil 2 teaspoons green garlic, minced 4 thin slices prosciutto, cut into julienne, then finely chopped 3 …