I never used my Q&C vouchers there but yes the Churro is the dessert. They sometimes have another type of fried bread thing that is shaped like a taco, but it always seems to be "sold out"
I didn't feel the Cantina was a good value for the coupon.
By the way, did everyone know that when you eat at the Cantina you can buy just what you want? One night I wanted two cheese echiladas during Illuminations. They charged me $1.70 for each, not bad and a great snack with a Fiesta Margarita. Peggie