Creating delicious Ham & Cheese Croissants is simple with these easy steps:

1. Preheat the Oven: Start by preheating your oven to 375°F (190°C).
2. Prepare Baking Sheet: Line a baking sheet with parchment paper for easy cleanup.
3. Unroll Croissant Dough: Open the package and carefully unroll the croissant dough on a clean surface.
4. Add Mustard: Spread a thin layer of mustard on each triangle of dough, if using.
5. Layer Ham and Cheese: Place one slice of ham and one slice of cheese on each triangle of dough.
6. Roll the Croissants: Starting from the wide end of the triangle, roll the dough towards the point, forming a crescent shape.
7. Place on Baking Sheet: Arrange the rolled croissants on the prepared baking sheet, leaving space between each.
8. Prepare Egg Wash: In a small bowl, beat the egg and brush it over the tops of the croissants for a golden finish.
9. Bake: Place the baking sheet in the preheated oven and bake for 15-20 minutes or until golden brown.
10. Cool Slightly: Once baked, allow the croissants to cool for a few minutes before serving.

These simple steps will guide you to create the most incredible Ham & Cheese Croissants effortlessly.