Pre-heat the oven at 200°C

Separate the sheets of Puff pastry.

Peel and de-core the apples, cut into small cubes.

Mix the ingredients together with a wooden spoon.

Scoop some of Step 4 on each of the pastry sheets, moisten the edges and fold diagonally. Press the edges together using a fork.

With a brush, spread some beaten egg on the top of each triangle. Optionally sprinkle some crystal sugar on them.

Put the pastries on greaseproof paper and place in the oven for 25 minutes.

If you sprinkled sugar on the pastries, check after 15 minutes to make sure they're not getting to dark. If needed, lower the temperature to 180°C