My two are completely opposite. The

will not touch anything that is remotely unhealthy and the

is a junk food junkie. The

loves ice cream, but we restrict him to a very small amount of vanille. He is also a HUGE fan of popsicles, when ever my wife and I are eating popsicles, he always flies to us and begs, since there is nothing bad in them we let him nibble. I gave them some onion rings for lunch today, I guess that is wierd parrot food. Also, they prefer burger king hamburgers over any other fast food burger. Wendy's they will nibble at, McD's they will nibble at, but BK they tear into like they are starving. Niether of them like pellets, and I have tried and tried to get them to eat pellets, but to no avail. So in the cage they get fresh fruit, dried fruit and a conure mix. Out of the fruits, grapes and raisins are definitely thier favorites.
But as for the original question, I guess onion rings and popsicles.