Thanks all. I liked Gringo's idea of adding a little curry for a different flavor profile. I am not big on relish, but liked several ideas of adding celery for crunch. Since I did not have celery I added some shredded carrots for color and crunch. In the end I used mayo, Dijon mustard, curry powder, shredded carrots, green onion, field greens, salt and pepper. Sorry, nothing with the pit (although I am going to try smoking eggs as suggested), but a good sandwich.
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