Fry chopped onion on a pan with oil.
Cut the ham thin strips.
Grate the cheese.
Mix onion, ham, cheese and one egg.
Slightly roll a puff pastry. (How to make puff pastry show inside.)
Cut into small rectangles and add a bit of mixture, what was prepared before.
Mix remaining egg and grease edges of the rectangles.
Close rectangles, so that the filling remains inside.
Grease with egg and place into a fridge for 20 min.
Preheat oven to 190 c deg.
Take out from the fridge and grease with egg one more time.
Put on a tray with oil and bake in the oven 20 - 25 min.
From chef Alex B