In a bowl, combine Greek yogurt, olive oil, minced garlic, lemon juice, dried oregano, salt, and pepper to make the marinade.
Cut the chicken breasts into strips and add them to the marinade. Ensure they're well coated. Cover the bowl and refrigerate for at least 30 minutes (up to 2 hours for more flavor).
Preheat the grill or stovetop grill pan over medium-high heat.
Remove the chicken from the marinade and grill for about 8-10 minutes, flipping halfway through, until fully cooked (internal temperature reaches 165°F).
While the chicken cooks, prepare the pita pockets by gently warming them in a dry skillet for 1-2 minutes or in the oven at 350°F until they're soft and pliable.
Once the chicken is done, let it rest for a few minutes before slicing it into bite-sized pieces.
To assemble the pita pockets, open each pita and fill it with a generous amount of grilled chicken, followed by cherry tomatoes, diced cucumber, red onion slices, and crumbled feta cheese.
Garnish with fresh parsley on top for added freshness and flavor.
Serve warm and enjoy your delicious Greek Chicken Pita Pockets!
Notes
Marinating the chicken for longer enhances the flavor.