Soak the skewers in cold water for about 30 minutes so they won't burn when they go over the coals. Trim any drastic fat off the pork, but leave some on for flavor and moistness. Cut the meat into rough 3/4-inch cubes. Thread 6 pork cubes onto each skewer, leaving space at the top to spike the bread.
Put the skewers onto a plate, sprinkle with the oregano that you crush between your fingers, a little salt, and pepper. Drizzle the oil over and turn to coat evenly.
Preheat a grill to high and put the rack about 4 inches from the coals. Grill the souvlaki until nice and grilled looking here and there and still moist, not dry inside. Grill the bread lightly on both sides and spike it on the end of the skewers. Serve on a plate, or on squares of parchment paper, scattering over some extra salt and oregano. Serve hot, with lemon juice squeezed over.
Recipe courtesy of From Food from Many Greek Kitchens by Tessa Kiros/Andrews McMeel Publishing