Instructions

  1. Defrost the puff pastry for 20-30 minutes.
  2. Gently fry the onion, carrot, and potato in the oil for about 5 minutes.
  3. Add mushrooms, soy sauce, ketchup, thyme, and salt & pepper.
  4. Cook, stirring occasionally, until the vegetables are soft and tender. Let cool.
  5. Preheat oven to 400°F.
  6. Cut each sheet of puff pastry into 4 squares.
  7. Divide the filling among them, placing it to one side across the diagonal. Brush pastry edges with egg (I just use water) and fold over into triangles and press well to seal.
  8. Put them on baking sheets (if you didn't make them directly on the baking sheets) and glaze with the beaten egg, if you like.
  9. Bake for 15-20 minutes, until golden brown.