Ingredient:

• 8 cups sliced Yukon gold potatoes (1/8-inch slices)
• 3 tablespoons all-purpose flour
• 2 teaspoons minced fresh thyme, divided
• 1 teaspoon salt
• 1/2 teaspoon garlic powder
• 1/4 teaspoon pepper
• 1/8 teaspoon ground nutmeg
• 1/8 teaspoon cayenne pepper, optional
• 1-1/2 cups (6 ounces) shredded Gruyere or Swiss cheese, divided
• 1-1/3 cups heavy whipping cream
• 2 tablespoons melted butter