Again, this is a recipe that you could easily toss in othe ingredients: chopped black olives, artichoke hearts, fresh spinach, or spice it up with a chopped jalepeno pepper. I don't do green peppers (or red or orange or yellow either), but they would work well in this.
Ooo . . . or how about toasted pine nuts? Or grilled onions? Or Hot Italian sausage instead of chicken?
See? Just about anything would work.