A festive and easy-to-make Thanksgiving side dish featuring layers of tender sweet potatoes, tart cranberries, and a crispy, cheesy breadcrumb topping infused with rosemary.
Use a mandoline slicer for even sweet potato slices to ensure uniform cooking. Tent with foil if the breadcrumb topping browns too quickly. Fresh rosemary is preferred but dried can be used. For dairy-free or vegan versions, substitute cream with coconut milk, use vegan butter and plant-based cheese, and swap panko for gluten-free breadcrumbs if needed. Resting the gratin after baking helps it set and makes slicing easier.
Keywords: sweet potato gratin, cranberry gratin, Thanksgiving side dish, holiday recipe, crispy gratin, cheesy sweet potatoes