- 1 sheet of puff pastry, thawed
- 4 slices of ham (or thinly sliced deli ham)
- 4 slices of cheese (cheddar, Swiss, or gruyère work well)
- 1 egg (for egg wash)
- 1 tablespoon milk
- ½ teaspoon Dijon mustard (optional, for extra flavor)
- ½ teaspoon black pepper
- ½ teaspoon dried oregano or thyme (optional)