Chicken with salt and pepper; dust with flour. Add oil to large skillet on medium-high heat; pan-sear chicken 2 to 3 min. on each side or until golden brown. Transfer to parchment paper-lined sheet pans. Coat chicken with barbecue sauce.
In 375ºF (190ºC) standard oven until done (170ºF [77ºC]). Cool to room temperature. Refrigerate until ready to use.
Pita breads with cooking spray; sprinkle with chili powder. Grill or bake until warm. Cut each pita into 8 wedges. Set aside.
For each serving:
1 cup (250 mL) lettuce, 2 Tbsp. (30 mL) each carrots, onions and cheese, and 1 Tbsp. (15 mL) peppers.
With 1 chicken breast, sliced on the diagonal. Garnish with 4 tomato wedges and 4 pita wedges. Drizzle with 2 Tbsp. (30 mL) dressing.