Start by marinating the chicken: In a bowl, mix olive oil, oregano, garlic powder, paprika, salt, and pepper. Coat the chicken breasts in the marinade and let them sit for at least 30 minutes (or up to 2 hours for more flavor).
Preheat your grill or grill pan over medium-high heat. Cook the marinated chicken for about 6-7 minutes on each side, or until fully cooked through and the internal temperature reaches 165°F (75°C). Remove from heat and let it rest for a few minutes.
While the chicken is resting, prepare the filling: In a large bowl, combine the cherry tomatoes, cucumber, red onion, romaine lettuce, and feta cheese. Toss gently to mix.
Slice the cooked chicken into strips, then add to the vegetable mixture. Drizzle with lemon juice and season with additional salt and pepper if needed. Toss everything together until well combined.
Warm the pita pockets in the oven for about 5 minutes, or until soft.
Carefully open each pita pocket and fill with the chicken and vegetable mixture. Top with a dollop of Greek yogurt and garnish with fresh dill if desired.
Serve immediately and enjoy your fresh and flavorful Greek Chicken Pita Pockets!
Notes
Let the chicken marinate for longer for more flavor.