Buffalo Chicken Wrap

With a fork, roughly mash blue cheese and mix with yogurt; season with salt and pepper. Season chicken with salt and pepper and, in a nonstick skillet, cook over medium-high until browned and cooked through. Transfer chicken to a small bowl and immediately toss with butter and cayenne-pepper sauce until coated. Roll up chicken pieces, carrots, celery, and lettuce in a warm tortilla; serve with blue-cheese dip.