Spray chicken 10 times with I Can't Believe It's Not Butter!® Spray Original in medium bowl. Add with salt, cumin and garlic; toss to coat.
Cook chicken in preheated 10-inch nonstick skillet over medium-high heat, stirring occasionally, 5 minutes or until chicken is thoroughly cooked. Stir in cilantro. Remove chicken and keep warm.
Spray onion and red peppers in medium bowl with remaining 10 Sprays; toss to coat.
Cook vegetables in same preheated skillet over medium heat, stirring occasionally, 5 minutes or until crisp-tender. Serve chicken and vegetables in tortillas and, if desired, with fat free sour cream and lime wedges.