1. In a large skillet, heat oil on medium-high. Add chicken & cook 7-10 minutes or until cook through.
2. In a medium bowl, combine tomato, cucumber, avocado, onion, lemon juice & Italian seasoning.
3. Wrap pitas in a wet paper towel & microwave 10-15 seconds to warm.
4. To serve, fill pita with lettuce, chicken & vegetable mix. Fold in half & top with homemade ranch dip.