1. Prepare the marinade. Combine all of the marinade ingredients in a large resealable bag or container and add the cubed pork. Toss to coat and place the pork in the fridge, at least 2 hours prior to grilling**.
2. About 30 minutes to an hour before grilling, soak your wooden skewers (if using) in water. This recipe will require about 4 skewers.
3. Prepare the tzatziki sauce. In a small bowl, whisk together the yogurt, grated cucumber, garlic, dill, parsley and lemon juice. Taste, and add a dash of salt and pepper to taste. Refrigerate until ready to serve.
4. Grill the pork. Preheat your grill to medium-high heat. Remove the pork from the bag, and discard the remaining marinade. Thread the pieces of pork onto the skewers. Brush the grill lightly with oil (I use a soaked paper towel) then place the skewers on the grill***, cooking them for about 4-5 minutes on each side (turning once) until browned and cooked through, to 145 F. Remove the skewers to a plate.
5. To serve, place a warmed pita on each plate, followed by 1-2 souvlaki skewers, and drizzle the tzatziki sauce all over. Squeeze some fresh lemon juice all over the dish for added taste!

Leftover souvlaki can be kept in the fridge for 2-3 days, in an airtight container. The tzatziki sauce will last in the fridge for about 4-5 days.