3 leek gruyeere mushroom gratin Recipes

olive oil, chopped leeks (white and pale green parts only; about 3 large), cubes assorted mushrooms (such as crimini and stemmed shiitake; about 10 cups), garlic cloves, minced, yukon gold potatoes, peeled , cut into 1/8-inch-thick slices, heavy whipping cream, more) salt, more) freshly ground black pepper, coarsely grated gruyere cheese

butter, oyster mushrooms, halved if large, minced garlic, sliced leeks (white and pale green parts only; about 4 large), minced fresh thyme, canned low-salt chicken broth, whipping cream, dry white wine, salt, ground black pepper, russet potatoes, peeled, thinly sliced into rounds (about 8 cups), grated gruyere cheese (about 10 oz)