Ingredients

• cooking spray
• 2.5 pounds Yukon gold potatoes , peeled
• 1.5 cups low-moisture part-skim mozzarella cheese
• 1.5 cups Swiss cheese
• 0.75 cups Parmesan cheese
• 2 large eggs
• 2.5 teaspoons kosher salt
• 0.5 teaspoons ground black pepper
• 0.5 cups all-purpose flour
• 0.33 cups whole milk
• 2 tablespoons chives
• 1 teaspoon baking powder
• 1 tablespoon seasoned breadcrumbs
• flaky sea salt

Instructions

1. 1 Gather all ingredients.
2. 2 Preheat the oven to 350 degrees F (180 degrees C). Spray a 9-inch springform pan with cooking spray and set it on a large rimmed baking sheet. Soak peeled potatoes in a large bowl of cold water for at least 15 minutes or up to 30 minutes.
3. 3 Meanwhile, toss together mozzarella, Swiss, and 1/2 cup Parmesan cheese in a bowl until evenly combined; set aside.
4. 4 Whisk together eggs, salt, and pepper in a large bowl until just lightened in color and foamy, about 1 minute. Whisk in flour, milk, chives, and baking powder; set aside until ready to use.
5. 5 Drain potatoes and pat dry with a clean kitchen towel; using a mandoline, slice potatoes into 1/8-inch-thick slices and pat sliced potatoes dry.
6. 6 Fold sliced potatoes into egg mixture until evenly coated.
7. 7 Transfer 1/3 of potato mixture into the bottom of the prepared pan, firmly pressing down into a flat, even layer; sprinkle evenly with 1/2 of cheese mixture. Repeat layering 1 time, ending with potato mixture and gently pressing down in between each layer; leave excess egg mixture in the bowl and discard.
8. 8 Sprinkle top evenly with bread crumbs and remaining 1/4 cup Parmesan. Cover tightly with aluminum foil.
9. 9 Bake in the preheated oven until potatoes are tender when pierced with a wooden pick, about 1 hour 45 minutes. Remove foil during the last 45 minutes.
10. 10 Remove from the oven. Let cool in the pan on a wire rack for 10 minutes. Run an offset spatula or butter knife along edges of pan. Remove sides of the springform pan.
11. 11 Garnish with chives and flaky salt; slice and serve.

Nutrition per serving