Wrap sliced deli ham and cheddar cheese in puff pastry for a simple yet delicious appetizer. These hot ham and cheese pinwheels are super customizable and are sure to disappear in a snap!
Preheat oven to 400°F. Line a large baking sheet with parchment or a silicone baking mat.
On a lightly floured surface, unfold the thawed puff pastry. Using a rolling pin, roll the pastry out to a square about 11x11 inches.
In a small bowl, stir together the mustard, honey, chives, and black pepper. Brush evenly over the pastry, except for about ½ inch along the side farthest from you.
Layer the ham evenly over the mustard, followed by the cheese, making sure not to cover the ½-inch border on the furthest edge.
In a small bowl, whisk together the egg and water. Brush along the exposed edge of the pastry.
Starting at the side opposite the egg wash, tightly roll the pastry. Gently press the egg-washed edge to the roll to seal and place the seam on the bottom of the roll.
Use a large, sharp knife to cut the roll into about 20 pieces. Place cut-side down on the prepared baking sheet. Brush the tops lightly with the egg wash. If desired, sprinkle very lightly with a pinch of flaky sea salt.
Bake for about 15 minutes, until golden. Remove from the oven and let rest on the baking sheet for a few minutes, until the cheese stops bubbling. Transfer to a wire cooling rack to cool for a few more minutes.