01 - In a bowl, combine olive oil, oregano, cumin, garlic powder, smoked paprika, salt, pepper, and lemon juice. Add chicken breasts and coat evenly with the marinade.
02 - Grill or pan-sear marinated chicken over medium-high heat for 6-7 minutes per side, or until internal temperature reaches 165°F. Let rest for 5 minutes before slicing thinly against the grain.
03 - While chicken cooks, whisk together Greek yogurt, olive oil, lemon juice, minced garlic, dill, salt, and pepper in a small bowl until smooth and well combined.
04 - Heat tortillas in a dry skillet over medium heat for 30 seconds per side or microwave wrapped in damp paper towels for 20-30 seconds until pliable.
05 - Build each taco by layering sliced chicken, shredded lettuce, cherry tomatoes, cucumber, red onion, Kalamata olives, and crumbled feta onto warmed tortillas.
06 - Drizzle assembled tacos generously with yogurt sauce, garnish with fresh chopped parsley, and serve immediately while tortillas are still warm.