Add olive oil to a medium skillet, turn to medium-low heat, add onion rings and cook until caramelized, about 20 minutes. In the meantime, cook turkey as instructed below.
Add ground turkey to a large skillet, cook over medium heat and break up with a fork while cooking. Cook until turkey is almost done, about 8 minutes. Drain turkey, return to skillet and add seasonings, water, sun-dried tomatoes, and continue cooking until cooked through and most of the water has been absorbed.
Preheat oven to 350 degrees.
Place 1/2 cup turkey mixture in the center of each tortilla, evenly divide caramelized onions and Feta over turkey. Roll tortillas, spray both sides with nonstick cooking spray, and place seam side down on a parchment-lined or nonstick cookie sheet. Bake 10 minutes, turn over and continue baking an additional 10 minutes or until tortillas are crispy.
If desired, dip wrap in non-fat Greek Yogurt or sour cream.