23 creamy au gratin Recipes

butter, divided, all-purpose flour, sea salt, half-and-half, russet potatoes - scrubbed, unpeeled , and cut into 1/4-inch slices, onion, sliced into rings, chopped fresh rosemary, shredded cheddar cheese, sea salt and ground black pepper to taste, shredded cheddar cheese, paprika

yukon gold potatoes, peeled and very thinly sliced, garlic, minced, salt, heavy cream, divided, freshly ground black pepper to taste, freshly grated nutmeg to taste, freshly shredded gruyere cheese, divided