Sprinkle Greek or Grill Seasoning on the 4 chicken breasts, both front and back.
Spray grill pan and cook chicken until done, about 6 minutes on each side.
While chicken is cooking, chop lettuce, cucumber, tomatoes, red onion, and peperoncinis.
Place in a bowl and add the feta cheese. Mix.
For the dressing:
Mix above dressing ingredients in a bowl or mason jar.
Pour about 1/4 cup of dressing on the vegetable mix.
Once chicken has finished cooking, slice and add to tortillas.
Place about 1 cup of the vegetable mixture on top of chicken and wrap up tortilla.