2 pounds boneless skinless chicken breasts

2 tablespoons olive oil

2 tablespoons lemon juice

2 teaspoons smoked paprika (or regular paprika)

2 teaspoons ground cumin

2 cloves garlic, minced

1 teaspoon ground turmeric

1 teaspoon ground coriander

1 teaspoon kosher salt

1/4 teaspoon freshly ground black pepper

1/4 teaspoon onion powder

1/4 teaspoon ground cinnamon

1/8 teaspoon crushed red pepper flakes (optional, adjust to taste)

1 cup plain Greek yogurt

2 cloves garlic, minced

1/2 teaspoon dried dill weed

2 teaspoons lemon juice

Salt and freshly ground black pepper to taste

1-inch piece of English cucumber, peeled and finely diced

6 pitas or flatbreads

1 small romaine heart, chopped

1 cup cherry tomatoes, halved

1/2 red onion, thinly sliced

1/2 English cucumber, thinly sliced

Crumbled feta cheese (optional)