Toaster-Oven Chicken Souvlaki

Cut onion from pole to pole into 4 even wedges; discard thin inner core. Cut each wedge crosswise into 3 pieces.

Whisk oil, lemon zest, honey, oregano, salt, and pepper together in medium bowl. Transfer 2 tablespoons oil mixture to large bowl; set aside. Toss chicken, bell pepper, and onion with remaining oil mixture.

Adjust toaster oven rack to middle position, select highest broiler function, and heat broiler. Set small wire rack in small rimmed baking sheet. Thread chicken, bell pepper, and onion in alternating pattern on two 12-inch skewers or four 6-inch skewers. Arrange skewers on prepared rack and broil until spotty brown on first side, 5 to 7 minutes. Flip skewers and continue to broil until chicken is spotty brown on second side and registers 160 degrees, 5 to 7 minutes.

Whisk lemon juice into reserved oil mixture and season with salt and pepper to taste. Using fork, push chicken and vegetables off skewers into bowl of oil mixture and toss to coat, breaking up onion chunks; let sit for 5 minutes.

Lay each pita on 12-inch square of foil. Spread each pita with 2 tablespoons tzatziki. Place one-half of chicken and vegetables in middle of each pita. Roll each pita into wrap, using foil to hold shape, and serve.