The Chicken Fiesta Melt was a short lived, but, IMHO, very good taco-variation from those masters of reinventing uses for the same ingredients, Taco Bell.

The basic idea was thus:

Soft taco exterior.
Usual Taco Bell veggies: lettuce, tomato chunks and thin slices of onion
Strips of grilled chicken
Melted cheese
Some kind've sauce

Despite its simplicity, it made for a good meal. It will be missed.