4 potato and portobello mushroom gratin Recipes

water, dried porcini mushrooms, portobello mushrooms, olive oil, garlic cloves, minced, yukon gold potatoes or white-skinned potatoes, peeled, cut into 1/8-inch-thick slices, chopped fresh parsley, chopped fresh thyme, chopped fresh rosemary, salt, ground black pepper

yukon gold potatoes, peeled, portobello mushroom caps, sliced thin, grated hard cheese such as parmesan or asiago, half and half, kosher salt and ground black pepper

crumbled blue cheese (such as stilton, gorgonzola or maytag blue; about 1 1 /2 cups), room temperature, whipping cream, salt, pepper, butter, mixed fresh wild mushrooms (such as chanterelle, morel, portobello, stemmed shiitake, oyster, crimini or hedgehog), thickly sliced, chopped fresh thyme or 3/4 tsp dried, yukon gold potatoes, peeled, very thinly sliced into rounds