Knossos Herbs - Souvlaki

1 kilo (2 lbs 4 oz) pork
12 "pita" bread
2-3 tomatoes, sliced
2 onions, sliced
1 teacup olive oil
2 tablespoon parsley,
finally chopped
Salt-pepper
Oregano
"Tzatziki" (optional)
Cut the pork into small cubes Place it in a bowl with salt, pepper, oregano and olive oil. Lift the meat out and thread it on small wooden skewers. Cook under a hot grill on both sides (about 7 minutes on each side). Heat the "pita" bread. Remove the grilled pork from the skewers and place an appropriate amount of it on each"pita" bread, along with some onion, parsley, slices of tomato, salt, pepper and some "tzatziki", if desired. Serve warm on individual dishes.