Savory ham and cheese pinwheels rolled in flaky pastry are a high protein, family-friendly party appetizer. These elegant, bite-sized treats are perfect for easy entertaining.
Preheat your oven to 400°F for even baking, and line a baking sheet with parchment paper for easy cleanup.
Unfold the thawed puff pastry sheet on a lightly floured surface and gently roll it into a 10x12 inch rectangle for uniform pinwheels.
Spread Dijon mustard evenly over the pastry, then layer with sliced ham and sprinkle Swiss cheese over the entire surface.
Start at one long edge and roll the pastry up tightly. Chill the roll in the freezer for 10 minutes to make slicing cleaner.
Slice into 12 equal rounds using a sharp knife. Transfer slices to the baking sheet, cut side up. Brush each with beaten egg and season with black pepper.
Bake for 15–18 minutes, watching for golden brown pastry and fully melted cheese. Cool slightly before serving to set the filling.