Step 1

Preheat grill to medium-high or position rack in upper third of oven and preheat broiler. If grilling, oil the grill rack (see Tip). If broiling, coat a broiler pan with cooking spray.

Step 2

Sprinkle chicken with 1 teaspoon garam masala and 1/2 teaspoon salt. Place the chicken on the grill rack or prepared pan and cook until no longer pink in the center and an instant-read thermometer inserted into the thickest part registers 165 degrees F, 4 to 8 minutes per side, depending on the size of the breast. Transfer the chicken to a clean cutting board and let rest for 5 minutes.

Step 3

Meanwhile, combine cucumber, yogurt, cilantro (or mint), lemon juice, the remaining 1/2 teaspoon garam masala and 1/4 teaspoon salt and pepper in a small bowl. Thinly slice the chicken. Split open the warm pitas and fill with the chicken, yogurt sauce, lettuce, tomato and onion.