How Do I Make Scalloped Potatoes? Try My Creamy Comfort

Ingredients

• 2 lbs russet potatoes, peeled and thinly sliced
• 1 medium onion, finely chopped
• 4 tablespoons unsalted butter
• 4 tablespoons all-purpose flour
• 2 cups whole milk
• 1 cup shredded sharp cheddar cheese
• 1 teaspoon garlic powder
• 1 teaspoon salt
• ½ teaspoon black pepper
• ¼ teaspoon nutmeg (optional)
• ½ cup grated Parmesan cheese
• Fresh parsley for garnish (optional)