Step 1

Combine chicken pieces, garlic, olive oil, oregano, salt, black pepper and lemon juice in a large ziplock bag or mixing bowl, and toss until the chicken is evenly coated.  Seal/cover and refrigerate for 30 minutes, or up to 1 day.

Step 2

Remove chicken from bag/bowl, and discard the leftover marinade.  Thread chicken onto skewers**.

Step 3

To Cook Chicken On The Grill: Preheat grill to medium-high.  Place skewers on the grill and cook for 6-8 minutes, turning once, until the chicken is cooked through and no longer pink inside.  Transfer skewers to a separate plate, and set aside.

Step 4

To Cook Chicken In The Oven: Preheat broiler, and place the rack about 5-6 inches from the top of the oven.  Place skewers on a large baking sheet, and broil for 6-8 minutes, turning once, until the chicken is cooked through and no longer pink inside.  Transfer skewers to a separate plate, and set aside.

Step 5

To assemble the chicken souvlaki pitas, lay a piece of pita bread out on a flat surface, and top it with a few pieces of chicken and your desired toppings and tzatziki sauce.  Serve immediately.