Crispy Potato Latkes From 'The Artisan Jewish Deli at Home'

Ingredients (9)

• 1 pound Russet potatoes
• 1 1/2 medium (8 ounces) yellow or white onions
• 1 1/2 teaspoons kosher salt
• 1/2 teaspoon freshly ground black pepper
• 2 tablespoons all-purpose flour
• 1 large egg
• 1 1/2 cups vegetable oil or chicken schmaltz
• 1 cup applesauce, optional, for serving
• 1 cup sour cream, optional, for serving