Potato, Leek, and Mushroom Gratin Recipe – Sunset Magazine

Ingredients

• 1/4 cup (1/8 lb.) butter
• 1 pound fresh shiitake mushrooms, rinsed, stems removed, and sliced
• 1 tablespoon minced garlic
• 4 leeks (3 1/2 lb. total)
• 1 tablespoon minced fresh thyme leaves
• 3 3/4 pounds russet potatoes
• 1 3/4 cups low-sodium chicken broth
• 1 3/4 cups whipping cream
• 1/4 cup dry white wine
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 3 1/2 cups shredded Gruyère cheese (12 oz.)