In a bowl, whisk together olive oil, lemon juice, minced garlic, salt, and pepper. Add the chicken breasts and ensure they are well coated. Let marinate for at least 30 minutes.

Heat a grill pan over medium heat. Once hot, add the marinated chicken. Cook for about 6-7 minutes on each side until fully cooked and grill marks are visible. Let rest, then slice into strips.

In a separate bowl, mix Greek yogurt, grated cucumber, minced garlic, lemon juice, dill, and salt to create the tzatziki.

If you need roasted bell peppers, slice fresh ones, toss with olive oil, salt, and pepper, then roast in the oven at 400°F (200°C) for 20-25 minutes until tender and slightly charred.

Spread a generous layer of feta tzatziki on one side of warm pita bread. Layer in sliced chicken and roasted bell peppers. Add fresh herbs if desired.

Cut stuffed pitas in half, plate, and enjoy the flavor explosion!