Start by preparing the dressing. In a small bowl, mix Greek yogurt, lime juice, salt, pepper, and chili powder (if using). Stir until well combined and set aside.
Warm the whole wheat tortillas on a skillet for about 30 seconds on each side, just until they are pliable but not crispy.
On each tortilla, spread a generous amount of the yogurt dressing, covering the entire surface.
Layer the cooked chicken evenly down the center of each tortilla, followed by the sliced avocado, mixed greens, cherry tomatoes, red onion, and feta cheese.
Carefully fold in the sides of the tortilla and then roll from the bottom up to form a wrap. Ensure the filling is snugly packed inside.
For an added touch, you can grill the wraps on a skillet for 2-3 minutes on each side, until they are golden and crispy.
Slice each wrap in half at a diagonal and serve with any remaining dressing on the side for dipping.
Notes
Arrange the wraps neatly on a plate and garnish with extra avocado slices and cherry tomatoes. A small bowl of extra dressing can be served for dipping alongside.