Instructions

  1. Make the marinade: In a large bowl, combine the onion, ginger, garlic, lime juice, soy sauce and sugar.
  2. Whisk in the oil in a light stream.
  3. Stir in the crushed red pepper and the black pepper.
  4. Add the pork to the marinade, turning to coat completely.
  5. Set aside for 30 minutes to 1 hour.
  6. Preheat the oven to 350F.
  7. Make the peanut sauce: In a small bowl stir together all the sauce ingredients.
  8. Whisk in 1 ½ tblsps of water and set aside (make sure sugar is dissolved).
  9. Light a grill or preheat a grill pan over medium-high heat.
  10. Wrap the pitas in foil and warm them in the oven for 5-10 minutes, until pliable.
  11. Remove from the oven but do not unwrap.
  12. Remove the pork from the marinade and grill the slices, in batches if necessary, until just cooked through, 1-2 minutes per side.
  13. Transfer to a plate.
  14. Lay the pitas on a work surface.
  15. Spread each one with about 2 tsps of the peanut sauce and cover generously with watercress.
  16. Place a slice of pork off to one side on each pita.
  17. Top the meat with some spring onion slices.
  18. Fold the pitas in half and wrap in aluminum foil.
  19. Serve immediately.