01 -
Stretch out the puff pastry sheets until they're thin (aim for about 1/8 inch thickness), then slice each sheet into 4 squares of the same size.
02 -
Spread a teaspoon of Dijon on one side of each square. Top with a bit of shredded cheese, some ham, and finish with more cheese. Make sure you leave a clean border around the edges.
03 -
Wet the borders lightly with water. Fold the square to make a triangle and press the edges together. Use a fork to crimp all around the sides to seal it tightly.
04 -
Arrange the triangles on a baking tray lined with parchment paper, then let them chill in the fridge for 15–30 minutes. While you wait, preheat your oven to 400°F.
05 -
Coat the tops with an egg wash, make a few slits for venting steam, and scatter some thyme leaves over the top.
06 -
Bake in the oven for 15–20 minutes until they're puffed up and golden. Enjoy them warm and flaky!