1 puff pastry (available at baker store or European shops)
2 egg yolk, well whisked
Pre-heat the oven at 180oC for about 15 minutes
Fry onion with a dash of oil until it turn into caramel color, remove from the heat.
Well mix the pork with Pate Royal and caramelized onion, season with salt and pepper
Quickly spread the puff pastry onto baking paper, use the ring mold to cut it into 6 pieces. Fill the puff with a spoon full of pork, egg wash the edge and cover with another puff, seam the edge all around and decorate with a fork press.
Brush the egg over the top and bake in 20-25 minutes.