For warm and comforting meals, our collection of casseroles is top of its class.
Photo: Johnny Autry
The walnuts in this gratin offer a crunchy contrast to the roasted vegetables and cheesy rice mixture, while the splash of half-and-half adds creamy richness. The rice mixture can be made ahead and refrigerated. When ready to prepare, bring to room temperature, spoon into the baking dish, and proceed as directed at the end of step 5.