Whisk: Add 1 egg to a shallow bowl and whisk until smooth.
Dip: Dip each rice paper sheet into the egg, coating both sides, until just pliable.
Layer: Lay the sheets on a lightly oiled surface, slightly overlapping to form one large sheet.
Fill: Arrange ham slices across the center, then top with shredded mozzarella.
Roll: Roll tightly into a cylinder, sealing as you go, then gently coil into a compact spiral.
Brush: Brush the top with any remaining egg, then sprinkle generously with flaky salt.
Bake: Bake at 400°F for 10–15 minutes until golden and crisp.
Serve: Serve warm.
