Nothing wrong with vegetarians, besides the whole not eating meat thing. My modifications:
--brown 1/2 lb turkey sausage and a dash of red pepper
--make bean mixture and toast in tortilla as directed
--open quesadilla, add 1 leaf romain lettuce, thinly sliced tomato, 1/4 turkey, mustard, and mayo. Close and enjoy.
This adds the sustenance, kick, and tang the original recipe is just plain lacking. But the beans, salsa and cheese mixture really set it off.