First of all, pre-heat your oven and roll out your store-bought puff pastry (or your homemade one, that is).
Add your ham and try to cover all of the surface evenly.
Cut into triangles and roll your croissants!
I like them big, but they work well as tiny croissants as well! At the end, your baking plate will look something like this:
Bake at 180°-200°C / 350°-390°F depending on your oven and your preferences for approx. 20min – I am very bad at knowing how long I have to cook anything, I basically just stay in the kitchen and do the dishes or something while keeping an eye on it. By the way, this recipe works very well with salmon, or dried tomatoes / any kind of spreadable vegetable as well, if you want to do a vegetarian version!