Preheat oven to 450 degrees F. Place two pieces (3 or 4 oz. each, depending on your calorie level) of skinless chicken breast in 1/2 C. soy sauce mixed with 1/2 C. water for a half hour. Dice 2 T. each of cucumber, red onion, red bell pepper, tomato, and celery. Mix and set aside. Remove chicken from marinade and sprinkle with 2 tsp. Cajun Dust or other salt free Cajun seasoning. Place on baking pan, cover with foil and bake at 450 degrees F for 15 minutes. Cut into 1/4-inch strips. Heat 2 whole wheat pita breads (6 1/2 inches across). Slice open to form a pocket, and stuff each with 1/2 the chicken, 1/2 the vegetables, and 2 shredded lettuce leaves. Drizzle each with a mixture of 1 1/2 tsp. of Dijon mustard mixed with 1 tsp. honey. Fold, holding sides in with frilled pricks.