I've been simplifying my diet (getting older foods I have long eaten are now giving me problems, I just cannot find exactly which ones.) I've been eating one si

I've been simplifying my diet (getting older foods I have long eaten are now giving me problems, I just cannot find exactly which ones.) I've been eating one single type of food at a time, and I've discovered I can taste foods I had eaten over eight to twelve hours ago. Distinctively, not as a memory.